I am working to migrate 6..5.3 to 6.6.1 then to 7.6. I did brand new instal

I am working to migrate 6..5.3 to 6.6.1 then to 7.6.
I did brand new install of 6.6.1, but I am getting error below. All the engines are up except Process-Design engine.
Any idea what could be wrong here?

Process-Design 1/1 FATAL! GW1 is continuously restarting.
GW1 restarted 3 times...

OriginalPostID-132453

OriginalPostID-132453

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