JimU

I've searched everywhere for a solution to this and now I've got one I thought it was worth posting it here to save someone else alot of hastle. My problem was with the following code (this is just a snippet): xlBook = xlApp.Workbooks.Open(ExcelTemplate) When this was running the EXCEL.EXE process didn't end until the VB app. was ended. I changed the code to this: Dim xlBooks As Excel.Workbooks xlBooks = xlApp.Workbooks xlBook = xlBooks.Open(ExcelTemplate) And added the following to tidy up: System.Runtime.InteropServices.Marshal.ReleaseComObject(xlBooks) xlBooks = Nothing I found out about it at http://support.microsoft.com/default.aspx?scid=kb;en-us;317109&Product=vbNET My application works fine now, I hope it helps someone else.