Respected LakshmiPathiji,
As suggested we cannot correct once invoice generated and posted to some Wrong GL.
But in My client location they are transferring some amounts from one GL to another
Example: Two customer codes created for one customer in Customer master(End users mistake)
So the invoices posted to first customer code has been transfered to second and finally blocking the First customer code.
Dear-Pradeep ask your FI guy on this Transfer--he can help you.
Phanikumar