Hi, I have a large number of files in a Galaxy library that are stored externally using the upload from file path and setting copy to galaxy to no. A few times it has been necessary to rename or remove these files. I find that if the file was associated with a Galaxy history then that history is no longer accessible and produces a server error. I realise the best option is to keep copies of these files so that Galaxy histories remain consistent. However, it might be more user friendly if the particular history dataset displayed an appropriate error message and the rest of the history was still accessible. Thanks Shaun Webb -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.