We have seen this before where a customer's 'YLIBLST' file is out-of-sync. In this case, it had a length of 409 and should have been 2659.
Recommendation to resolved:
- Run 'YAPYY1DCHG Y1DLIB(Y1SY) Y1DTYPE(*ALL)'. (YAPYY1DCHG - Apply toolkit Data Changes)
- Then check with 'YWRKLIBLST' (Work with Library List) the stored library lists for models that are being compared.