Just tweak your code as shown below. It will solve your problem. Please follow the text highlighted in RED.
*** Insert this lines - Begin
PERFORM bdc_dynpro USING 'SAPMF05A' '0710'.
PERFORM bdc_field USING 'RF05A-XPOS1(05)'
'X'.
*** Insert this lines - End
PERFORM bdc_dynpro USING 'SAPMF05A' '0710'.
PERFORM bdc_field USING 'BDC_CURSOR'
'RF05A-XPOS1(05)'.
PERFORM bdc_field USING 'BDC_OKCODE'
'=PA'.
PERFORM bdc_field USING 'RF05A-AGBUK'
rw_10344-zbukrs.
PERFORM bdc_field USING 'RF05A-AGKON'
rw_10344-zagkon.
PERFORM bdc_field USING 'RF05A-AGKOA'
'D'.
PERFORM bdc_field USING 'RF05A-AGUMS'
v_gl.
PERFORM bdc_field USING 'RF05A-XNOPS'
'X'.
PERFORM bdc_field USING 'RF05A-XPOS1(01)'
''.
*** Comment this lines - Begin
* PERFORM bdc_field USING 'RF05A-XPOS1(05)'
* 'X'.
*** Comment this lines - End
Regards,
SaiRam