Topsar merge error

i want to merge subswath 2 and 3 with different number of burst and try to using topsar merge. but failed. any body can help me how to handle it?

Have you tried to merge both after debursting?
This is also how it is suggested in the (rather large and ineffective) graphs.

I guess the TOPS Merge doesn’t like the unwrapped data because it has probably lost some metadata.