diff --git a/src/data/write_init_files.py b/src/data/write_init_files.py
index 4e90de17..1918a994 100644
--- a/src/data/write_init_files.py
+++ b/src/data/write_init_files.py
@@ -971,8 +971,8 @@ def write_phys_read_subroutine(outfile, host_dict, host_vars, host_imports,
     outfile.write("end if", 7)
     outfile.write("if (constituent_has_default) then", 7)
     outfile.write("call const_props(constituent_idx)%default_value(constituent_default_value, constituent_errflg, constituent_errmsg)", 8)
-    outfile.write("if (constituent_errflg .ne. 0) then", 8)
-    outfile.write("call endrun(constituent_errmsg)", 9)
+    outfile.write("if (constituent_errflg /= 0) then", 8)
+    outfile.write("call endrun(constituent_errmsg, file=__FILE__, line=__LINE__)", 9)
     outfile.write("end if", 8)
     outfile.write("field_data_ptr(:,:,constituent_idx) = constituent_default_value", 8)
     outfile.write("if (masterproc) then", 8)