ans: I dont know why there is no entry in the log of me selecting pushback option in gsx.
As I've said, ALL the Couatl.LOG you sent, EXCEPT the first one, were made after a session with no errors. Only the 1st one contained an Exception IN the Couatl.LOG file, saying the connection with FSX/Simconnect was lost, most likely due to that error.
The new Simconnect log with REX, now shows again an Error caused by RAAS Professional:
> 7.81972 [127, 1]Open: Version=0x00000002 Name="RAAS Professional"
< 203.42442 [127] >>>>> EXCEPTION=3, SendID=32, Index=-1 <<<<<
The only explanation I have, is that one of the products causing errors, are confusing Simconnect in a way, that we don't even get the notification from Simconnect that something happened, but Simconnect nevertheless didn't respond, most likely when GSX ask for the weather information in order to check for possible icing conditions, which IS made during Pushback, which is the most likely case related to REX injecting the weather.
The issue is, we obviously have safety code that would prevent a problem if, for example, the metar returned was invalid but, in order for the code to working correctly ( it checks for any Simconnect exceptions ), Simconnect must still work in order to generate exceptions we can check. If it's just not working, not even reporting errors, which seems to be consistent with the lack of exceptions in the Couatl.LOG file, we cannot even know something was wrong.