Unable to see the BP in GTS system with reference to the External BP

Hi All,

i have created master record in ECC ,when i am trying to transfer the customer to GTS manually ,then pop up appears "Of 1 selected partner(s), 0 were processed successfully"

ECC detailed error message :

when i checked in GTS system the BP is not available but the BP data is available in the table level "/SAPSLL/PNTBP"

Can you please through some lights on this...

Sravan