Logical (feeder) system cannot be determined - GTS error during BP Update

Hi All,
While updating a BP in CRM system, I am getting the following error in application log SLG1 as "Logical (feeder) system cannot be determined". This occurs when we change or create a BP and call the function module " BAPI_TRANSACTION_COMMIT". The issue occurs from the function module "/SAPSLL/BP_XI_GET_LOGSYS" that does not provide any logical system. I feel this is due to any changes in GTS configuration as we did not find this issue earlier. Can anyone please provide me some directions in rectifying this issue.

Hi,
I just checked for the customer in GTS, but it is not shown there. I have following observations:
1. If i try to transfer Vendor from ECC to GTS, it is happening successfully. I could see that vendor in GTS.
2. Seems like Partner Number is allocated to Customer in GTS. I transferred Customer after successfully transferring vendor, Customer transferred failed!. So I again transferred Vendor from ECC to GTS, this happened successfully.
Observation:
First successfull vendor transfer: Partner Number in GTS: 134
Unsuccessfull transfer of Customer: Not visible in GTS
Second successfull vendor transfer: Partner Number in GTS: 136
Please see the above observation and let me if anything can be dudcted from this.
Also checked table BUT100 in GTS for Business Partners. Customer not visible here too.
Please Help!
Regards,
Madhav

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I have JRE 1.5.0_14 in the client machine.
Once this exception comes, no matter how many times I tried to relaunch the application same exception (cannot verify signature block is shown. Once i restart the server, its working fine.
Regarding jardiff, Yes. we use it.
Also, this exception is not shown on every machine which are trying to download same update. Only on few..
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