checkpoint file error

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Hi all,

I'm experiencing an error when I want to add an enzyme to a reaction. In Pathway Tools I move to a reaction frame in my PGDB. Then I click on the reaction frame and select 'Edit --> Create/Add Enzyme'. Depending whether I'm trying to access the enzyme using its protein identifier or gene identifier I get a similar type of error: an older 'checkpoint file' is referred to that involves this enzyme. C:\fakepath\proteincheckpointerror.pngC:\fakepath\genecheckpointerror.png

In each case, If i choose to keep/restore/discard the checkpoint file the result is that Pathway Tools freezes and I can do nothing else than to force it to quit.

I've been trying to find this 'checkpoint file' in the pathway-tools and ptools-local folder. The manual refers to a '.DBNAME-autosave.ckp' file which I'm unable to find. But this seems unrelated since I'm running my PGDB's in file-mode, not MySQL-mode.

System: Mac OSX El Capitan Pathway Tools version: 21.5 Any help would be appreciated to solve this problem, Thank you, Rudy