(re)throw EOF exception when next_dvector() has not yet read any items

src/potential_file_reader.cpp

@@ -144,6 +144,8 @@ void PotentialFileReader::next_dvector(double *list, int n)
 {
   try {
     return reader->next_dvector(list, n);
+  } catch (EOFException &) {
+    throw EOFException("EOF reached");
   } catch (FileReaderException &e) {
     error->one(FLERR, e.what());
   }

src/text_file_reader.cpp

@@ -189,8 +189,9 @@ void TextFileReader::next_dvector(double *list, int n)
     char *ptr = next_line();
 
     if (ptr == nullptr) {
-      // EOF
-      if (i < n) {
+      if (i == 0) { // EOF without any records
+        throw EOFException("EOF reached");
+      } else if (i < n) { // EOF with incomplete data
         throw FileReaderException(
             fmt::format("Incorrect format in {} file! {}/{} values", filetype, i, n));
       }