[galaxy-dev] why modified workflow doesn't save?

Hi,

after modification of workflow it does not save in workflow editor. Just shows saving bar for ever. In logs there are not so much info, just mentions that using version of tools are different from specified in this workflow. I work with "CloudMap Hawaiian ..." workflow. Galaxy is 16.04 with version of tools at June/July time.

Workflow file is a text file and potentially can be modified by hands. In this case on what I have to pay attention to change it in text editor. Is there any tutorial for this?

Thanx, Nikolaos.