Hi,
Just try the Below procedure.
In this function module ::: EXIT_SAPMM06E_012
One Include is there :: ZXM06U43 .
You have to implement it. I hope you know how to implement, Just double click on include and then press enter.
then put the break point. I all ready checked it. Gl account is capturing At T-code me22N.
Please Have a look on below attached image. For your Reference.
hope You got the Answer.