I have problems with Merge tool. I can't find the output file in ArcCatalog even though I refresh it. Output is shown in Results window but nothign happens if I click Add to display. Strangely, also Messages->View is empty but Inputs and Environments seems normal. I'm trying to merge shapefiles and these are in the same coordinate system and located in the same folder. I've also copied the folder where I have the files to be merged to a new location but it didn't help.
I saw ther was a similar question earlier but it has been closed, see https://gis.stackexchange.com/questions/182104/merge-success-but-can-not-find-and-display-in-arcmap