I have 4 workbooks - A, B, C and D that each run the same macro when opened. I got tired of opening each individually so, in workbook A I made a macro that opens B, C and D. When I execute the macro in A, it opens workbooks B, C and D and the macro does its job in B and C but does not work in D. If I close D and reopen it without using the macro in A, the auto open macro does its job just fine. I have looked at the macro coding and it looks the same for B, C and D.