SNAP does not correct the two files sentinel 1a/b

Greetings, I am processing interferograms with SNAP but for 1 week I started to fail the program, I no longer correct the two SAR SENTINEL 1A / B files when I apply S-1 TOPS-CORREGISTRATRIO, CORREGISTRATION. Only the first image corrects me, I also try to process step by step with; a). SENTINEL 1 TOPS SPLIT, b). Apply ORBIT, c). S-1 BACK GEOCODYNG but it doesn’t correct me either. It will be that I have sent, since previously it worked.

Creating Single Interferogram

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Also please have a look and you could also use this Processing Steps of Creating Single Interferogram In case you are applying the processes through out gpt

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Thank you very much, and resolved the problem, install the FILE OF ALL SNAP TOOL BOXES