ABAP runtime error during cancellation of Invoice

Hello Gurus,

I have an Invoice document which has around 2500 line items. When I am trying to cancel the Invoice document using VF11 it gives a Runtime error as "TIME_OUT" - Time limit exceeded.  The program "SAPLV60A" has exceeded the maximum permitted runtime without interruption and has therefore been terminated. It ran around 2 hours.

Can someone please tell me the procedure to cancel this Invoice. I know that we can try LSMW or BDC for this, but is there any other option apart from this.

Regards,

SNK.