diff --git a/code/IO.f90 b/code/IO.f90
index a5cbcedb3..7f3bfce95 100644
--- a/code/IO.f90
+++ b/code/IO.f90
@@ -202,7 +202,7 @@ subroutine IO_open_inputFile(myUnit,model)
    path = trim(getSolverWorkingDirectoryName())//trim(model)//InputFileExtension//'_assembly'
    open(myUnit,iostat=myStat,file=path)
    if (myStat /= 0_pInt) call IO_error(100_pInt,ext_msg=path)
-      if (abaqus_assembleInputFile(myUnit,myUnit+1_pInt)) call IO_error(103_pInt)     ! strip comments and concatenate any "include"s
+      if (.not.abaqus_assembleInputFile(myUnit,myUnit+1_pInt)) call IO_error(103_pInt)     ! strip comments and concatenate any "include"s
    close(myUnit+1_pInt) 
  
  else