ZZZitrone
From what I have understood Tobias has not yet tried the perl approach to resolving the keyframe 142 issue. And, can still do that.
Would your approach to resolving this Premiere Elements issue be any different than the perl approach documented by Adobe (specific for Premiere Elements) that Tobias can do?
Keyframe.h-142 error | Opening projects
Since you say this type of error is of special interest to you, would you comment on what you believe to be the cause(s) of the issue (at the project level) and how to avoid this problem moving forward in future projects?
ATR