So these projects work for a few days, and then problems appear, right?
Please attach a test project with which you can repeat the problem, here or in the forum PM.
@BasUser110 a mask is not a data type, but a url mask. The url does not have to contain a file extension. You need to look at which queries load this data and write a mask for them.
@fox i removed "parse line" action that is immediately after project start AND the crash changed to missing variable error. will look more into it. basically i used a keyword that had no value, or its only value was a word assigned by "parse line" before, that was a temporary value anyway.