How to troubleshoot Workflow publishing errors?

[JamesTye]

When attempting to save a workflow I am receiving the message that the workflow was not saved because of "Illegal characters in path."  The workflow runs fine without errors locally and I have been able to publish it until I made some additions. Obviously I can debug by reverting to my previous version and adding 1 change at a time then trying to publish, but it seems that Alteryx should be able to provide a hint at where this exception is happening.   Any suggestions?   

[JeremyRiley]

Besides the incorrect pipe count on a file path for Excel, I found another instance that will trigger this.  If you are using any Blob Input or Blob Outputs, double check the paths.  An typo in these (mostly an incorrect number of '\') will produced the same error message when trying to upload to Gallery.