I have read so many posts here about this but keep striking out: I have an Excel file with 2 sheets, I want to input each, do separate tasks on them and then save them out to the same file as 2 sheets. No matter how I try to do this, it doesn't work. The easiest way, using 2 input data tools works until I try to output the results as they are writing to the same file, just different sheets and I get the error that the file is in use. I do not see how to get the block until done into the mix as it is 2 different lines of tools. If there is an easy way to pause the 2nd flow's writing by 3-5 seconds that would be one way.