diff --git a/src/lagrangian/DSMC/parcels/Templates/DSMCParcel/DSMCParcelIO.C b/src/lagrangian/DSMC/parcels/Templates/DSMCParcel/DSMCParcelIO.C
index 783550c378..021c8e86ee 100644
--- a/src/lagrangian/DSMC/parcels/Templates/DSMCParcel/DSMCParcelIO.C
+++ b/src/lagrangian/DSMC/parcels/Templates/DSMCParcel/DSMCParcelIO.C
@@ -61,6 +61,18 @@ Foam::DSMCParcel<ParcelType>::DSMCParcel
         {
             is  >> U_ >> Ei_ >> typeId_;
         }
+        else if (!is.checkLabelSize<>() || !is.checkScalarSize<>())
+        {
+            // Non-native label or scalar size
+
+            is.beginRawRead();
+
+            readRawScalar(is, U_.data(), vector::nComponents);
+            readRawScalar(is, &Ei_);
+            readRawLabel(is, &typeId_);
+
+            is.endRawRead();
+        }
         else
         {
             is.read(reinterpret_cast<char*>(&U_), sizeofFields);
diff --git a/src/lagrangian/basic/injectedParticle/injectedParticleIO.C b/src/lagrangian/basic/injectedParticle/injectedParticleIO.C
index 10bdd4770f..958853851d 100644
--- a/src/lagrangian/basic/injectedParticle/injectedParticleIO.C
+++ b/src/lagrangian/basic/injectedParticle/injectedParticleIO.C
@@ -69,9 +69,21 @@ Foam::injectedParticle::injectedParticle
         {
             is  >> tag_ >> soi_ >> d_ >> U_;
         }
+        else if (!is.checkLabelSize<>() || !is.checkScalarSize<>())
+        {
+            // Non-native label or scalar size
+            is.beginRawRead();
+
+            readRawLabel(is, &tag_);
+            readRawScalar(is, &soi_);
+            readRawScalar(is, &d_);
+            readRawScalar(is, U_.data(), vector::nComponents);
+
+            is.endRawRead();
+        }
         else
         {
-            is.read(reinterpret_cast<char*>(&soi_), sizeofFields);
+            is.read(reinterpret_cast<char*>(&tag_), sizeofFields);
         }
     }
 
diff --git a/src/lagrangian/basic/particle/particleIO.C b/src/lagrangian/basic/particle/particleIO.C
index 521d888c5e..bfba21b67d 100644
--- a/src/lagrangian/basic/particle/particleIO.C
+++ b/src/lagrangian/basic/particle/particleIO.C
@@ -73,6 +73,27 @@ Foam::particle::particle
                 is  >> facei_ >> stepFraction_ >> origProc_ >> origId_;
             }
         }
+        else if (!is.checkLabelSize<>() || !is.checkScalarSize<>())
+        {
+            // Non-native label or scalar size
+
+            is.beginRawRead();
+
+            readRawScalar(is, coordinates_.data(), barycentric::nComponents);
+            readRawLabel(is, &celli_);
+            readRawLabel(is, &tetFacei_);
+            readRawLabel(is, &tetPti_);
+
+            if (readFields)
+            {
+                readRawLabel(is, &facei_);
+                readRawScalar(is, &stepFraction_);
+                readRawLabel(is, &origProc_);
+                readRawLabel(is, &origId_);
+            }
+
+            is.endRawRead();
+        }
         else
         {
             if (readFields)
@@ -103,6 +124,27 @@ Foam::particle::particle
                     >> p.origId;
             }
         }
+        else if (!is.checkLabelSize<>() || !is.checkScalarSize<>())
+        {
+            // Non-native label or scalar size
+
+            is.beginRawRead();
+
+            readRawScalar(is, p.position.data(), vector::nComponents);
+            readRawLabel(is, &p.celli);
+
+            if (readFields)
+            {
+                readRawLabel(is, &p.facei);
+                readRawScalar(is, &p.stepFraction);
+                readRawLabel(is, &p.tetFacei);
+                readRawLabel(is, &p.tetPti);
+                readRawLabel(is, &p.origProc);
+                readRawLabel(is, &p.origId);
+            }
+
+            is.endRawRead();
+        }
         else
         {
             if (readFields)
diff --git a/src/lagrangian/intermediate/parcels/Templates/CollidingParcel/CollidingParcelIO.C b/src/lagrangian/intermediate/parcels/Templates/CollidingParcel/CollidingParcelIO.C
index 4d265e4642..2d20855373 100644
--- a/src/lagrangian/intermediate/parcels/Templates/CollidingParcel/CollidingParcelIO.C
+++ b/src/lagrangian/intermediate/parcels/Templates/CollidingParcel/CollidingParcelIO.C
@@ -68,6 +68,18 @@ Foam::CollidingParcel<ParcelType>::CollidingParcel
             is >> angularMomentum_;
             is >> torque_;
         }
+        else if (!is.checkLabelSize<>() || !is.checkScalarSize<>())
+        {
+            // Non-native label or scalar size
+
+            is.beginRawRead();
+
+            readRawScalar(is, f_.data(), vector::nComponents);
+            readRawScalar(is, angularMomentum_.data(), vector::nComponents);
+            readRawScalar(is, torque_.data(), vector::nComponents);
+
+            is.endRawRead();
+        }
         else
         {
             is.read(reinterpret_cast<char*>(&f_), sizeofFields);
diff --git a/src/lagrangian/intermediate/parcels/Templates/KinematicParcel/KinematicParcelIO.C b/src/lagrangian/intermediate/parcels/Templates/KinematicParcel/KinematicParcelIO.C
index 74f26230a0..dc400a28b7 100644
--- a/src/lagrangian/intermediate/parcels/Templates/KinematicParcel/KinematicParcelIO.C
+++ b/src/lagrangian/intermediate/parcels/Templates/KinematicParcel/KinematicParcelIO.C
@@ -83,6 +83,25 @@ Foam::KinematicParcel<ParcelType>::KinematicParcel
                 >> tTurb_
                 >> UTurb_;
         }
+        else if (!is.checkLabelSize<>() || !is.checkScalarSize<>())
+        {
+            // Non-native label or scalar size
+
+            is.beginRawRead();
+
+            readRawLabel(is, &active_);
+            readRawLabel(is, &typeId_);
+            readRawScalar(is, &nParticle_);
+            readRawScalar(is, &d_);
+            readRawScalar(is, &dTarget_);
+            readRawScalar(is, U_.data(), vector::nComponents);
+            readRawScalar(is, &rho_);
+            readRawScalar(is, &age_);
+            readRawScalar(is, &tTurb_);
+            readRawScalar(is, UTurb_.data(), vector::nComponents);
+
+            is.endRawRead();
+        }
         else
         {
             is.read(reinterpret_cast<char*>(&active_), sizeofFields);
diff --git a/src/lagrangian/intermediate/parcels/Templates/MPPICParcel/MPPICParcelIO.C b/src/lagrangian/intermediate/parcels/Templates/MPPICParcel/MPPICParcelIO.C
index 82a1b557e4..9e2c5fd51b 100644
--- a/src/lagrangian/intermediate/parcels/Templates/MPPICParcel/MPPICParcelIO.C
+++ b/src/lagrangian/intermediate/parcels/Templates/MPPICParcel/MPPICParcelIO.C
@@ -63,6 +63,16 @@ Foam::MPPICParcel<ParcelType>::MPPICParcel
         {
             is >> UCorrect_;
         }
+        else if (!is.checkLabelSize<>() || !is.checkScalarSize<>())
+        {
+            // Non-native label or scalar size
+
+            is.beginRawRead();
+
+            readRawScalar(is, UCorrect_.data(), vector::nComponents);
+
+            is.endRawRead();
+        }
         else
         {
             is.read(reinterpret_cast<char*>(&UCorrect_), sizeofFields);
diff --git a/src/lagrangian/intermediate/parcels/Templates/ReactingParcel/ReactingParcelIO.C b/src/lagrangian/intermediate/parcels/Templates/ReactingParcel/ReactingParcelIO.C
index 0d81e59bc9..b74e991de6 100644
--- a/src/lagrangian/intermediate/parcels/Templates/ReactingParcel/ReactingParcelIO.C
+++ b/src/lagrangian/intermediate/parcels/Templates/ReactingParcel/ReactingParcelIO.C
@@ -63,14 +63,25 @@ Foam::ReactingParcel<ParcelType>::ReactingParcel
 
         if (is.format() == IOstream::ASCII)
         {
-            is >> mass0_ >> Ymix;
+            is >> mass0_;
+        }
+        else if (!is.checkLabelSize<>() || !is.checkScalarSize<>())
+        {
+            // Non-native label or scalar size
+
+            is.beginRawRead();
+
+            readRawScalar(is, &mass0_);
+
+            is.endRawRead();
         }
         else
         {
             is.read(reinterpret_cast<char*>(&mass0_), sizeofFields);
-            is >> Ymix;
         }
 
+        is >> Ymix;
+
         Y_.transfer(Ymix);
     }
 
diff --git a/src/lagrangian/intermediate/parcels/Templates/ThermoParcel/ThermoParcelIO.C b/src/lagrangian/intermediate/parcels/Templates/ThermoParcel/ThermoParcelIO.C
index abbb09baa4..8ffe611bf0 100644
--- a/src/lagrangian/intermediate/parcels/Templates/ThermoParcel/ThermoParcelIO.C
+++ b/src/lagrangian/intermediate/parcels/Templates/ThermoParcel/ThermoParcelIO.C
@@ -64,6 +64,17 @@ Foam::ThermoParcel<ParcelType>::ThermoParcel
         {
             is  >> T_ >> Cp_;
         }
+        else if (!is.checkLabelSize<>() || !is.checkScalarSize<>())
+        {
+            // Non-native label or scalar size
+
+            is.beginRawRead();
+
+            readRawScalar(is, &T_);
+            readRawScalar(is, &Cp_);
+
+            is.endRawRead();
+        }
         else
         {
             is.read(reinterpret_cast<char*>(&T_), sizeofFields);
diff --git a/src/lagrangian/molecularDynamics/molecule/molecule/moleculeIO.C b/src/lagrangian/molecularDynamics/molecule/molecule/moleculeIO.C
index 8e362182d2..75e907a3af 100644
--- a/src/lagrangian/molecularDynamics/molecule/molecule/moleculeIO.C
+++ b/src/lagrangian/molecularDynamics/molecule/molecule/moleculeIO.C
@@ -58,8 +58,8 @@ Foam::molecule::molecule
     rf_(Zero),
     special_(0),
     id_(0),
-    siteForces_(0),
-    sitePositions_(0)
+    siteForces_(),
+    sitePositions_()
 {
     if (readFields)
     {
@@ -74,15 +74,33 @@ Foam::molecule::molecule
                 >> potentialEnergy_
                 >> rf_
                 >> special_
-                >> id_
-                >> siteForces_
-                >> sitePositions_;
+                >> id_;
+        }
+        else if (!is.checkLabelSize<>() || !is.checkScalarSize<>())
+        {
+            // Non-native label or scalar size
+
+            is.beginRawRead();
+
+            readRawScalar(is, Q_.data(), tensor::nComponents);
+            readRawScalar(is, v_.data(), vector::nComponents);
+            readRawScalar(is, a_.data(), vector::nComponents);
+            readRawScalar(is, pi_.data(), vector::nComponents);
+            readRawScalar(is, tau_.data(), vector::nComponents);
+            readRawScalar(is, specialPosition_.data(), vector::nComponents);
+            readRawScalar(is, &potentialEnergy_);
+            readRawScalar(is, rf_.data(), tensor::nComponents);
+            readRawLabel(is, &special_);
+            readRawLabel(is, &id_);
+
+            is.endRawRead();
         }
         else
         {
             is.read(reinterpret_cast<char*>(&Q_), sizeofFields);
-            is  >> siteForces_ >> sitePositions_;
         }
+
+        is  >> siteForces_ >> sitePositions_;
     }
 
     is.check(FUNCTION_NAME);
diff --git a/src/lagrangian/solidParticle/solidParticleIO.C b/src/lagrangian/solidParticle/solidParticleIO.C
index 14d171f91b..d69ab73360 100644
--- a/src/lagrangian/solidParticle/solidParticleIO.C
+++ b/src/lagrangian/solidParticle/solidParticleIO.C
@@ -54,6 +54,17 @@ Foam::solidParticle::solidParticle
         {
             is  >> d_ >> U_;
         }
+        else if (!is.checkLabelSize<>() || !is.checkScalarSize<>())
+        {
+            // Non-native label or scalar size
+
+            is.beginRawRead();
+
+            readRawScalar(is, &d_);
+            readRawScalar(is, U_.data(), vector::nComponents);
+
+            is.endRawRead();
+        }
         else
         {
             is.read(reinterpret_cast<char*>(&d_), sizeofFields);
diff --git a/src/lagrangian/spray/parcels/Templates/SprayParcel/SprayParcelIO.C b/src/lagrangian/spray/parcels/Templates/SprayParcel/SprayParcelIO.C
index b23165c656..4a9ebb0428 100644
--- a/src/lagrangian/spray/parcels/Templates/SprayParcel/SprayParcelIO.C
+++ b/src/lagrangian/spray/parcels/Templates/SprayParcel/SprayParcelIO.C
@@ -86,6 +86,28 @@ Foam::SprayParcel<ParcelType>::SprayParcel
                 >> tMom_
                 >> user_;
         }
+        else if (!is.checkLabelSize<>() || !is.checkScalarSize<>())
+        {
+            // Non-native label or scalar size
+
+            is.beginRawRead();
+
+            readRawScalar(is, &d0_);
+            readRawScalar(is, position0_.data(), vector::nComponents);
+            readRawScalar(is, &sigma_);
+            readRawScalar(is, &mu_);
+            readRawScalar(is, &liquidCore_);
+            readRawScalar(is, &KHindex_);
+            readRawScalar(is, &y_);
+            readRawScalar(is, &yDot_);
+            readRawScalar(is, &tc_);
+            readRawScalar(is, &ms_);
+            readRawScalar(is, &injector_);
+            readRawScalar(is, &tMom_);
+            readRawScalar(is, &user_);
+
+            is.endRawRead();
+        }
         else
         {
             is.read(reinterpret_cast<char*>(&d0_), sizeofFields);