SNAP 3.0 in Windows 64 bit is not stable there are many problems with coregestration of SLC pair images like : 1- error in graph Topsar_split:9 2- Apply orbit file problems when un install it and install SNAP 2.2 there is no problem

Odd that the window lists 9999 bursts. Anyway, it is impossible to investigate the possible bug if you don’t post all the information needed to recreate it, see: Read this before posting