G74 for turning not recognized in Mach3.

Hello,

I am struggling with my postprocessor to do some turning with Mach3.
I have generated a g-code with Solidcam and there is the G74 code. Mach3 does not accept this.

I do not understand the G81 code and I think that this is intended for drilling on the mill, not for drilling while turning.
This is the part in my .gpp file for turning;

@turn_drill
   local string for for1 for2 for3
   for1 = '2/2.0(P)'
   for2 = '2/2.0(P*10)'
   for3 = '5.0(P*1000)'

   local numeric save_feed xc_new
   gcode = 74
   if drill_type eq drilling then
   r = 0
   q = abs(drill_lower_z + r)
   endif
   if drill_type eq peck then
   r = r
   q = (down_step)
   endif
   if drill_type <> tapping
   {nb 'G'gcode, ' R'r }
   {nb 'G'gcode, ' Z'drill_lower_z ' Q'q:for3}
   if drill_type eq peck then
   {' R0.'}
   endif
   if feed_unit eq css
   {' F'feed }
   else
   {' F'feed:'5.0(p)' }
   endif
   else
   gcode = 32
   save_feed =feed
   xc_new = 100-p_feed
   feed = feed*xc_new/100
   { nb 'G'gcode ' Z'drill_lower_z}
   if feed_unit eq css
   {' F'feed }
   else
   {' F'feed:'5.0(p)' }
   endif
   ;tbd.. check for a maximum of 10 mm mistake (BIG MISTAKE)
   ;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
   feed = save_feed
   {nb 'M5'}
   {nb 'G'gcode ' Z'drill_upper_z ' S'(spin*1.3):integer_def_f ' M4'}
   if feed_unit eq css
   {' F'feed }
   else
   {' F'feed:'5.0(p)' }
   endif
   endif
endp

Someone has been working at this, see the comment.

Can G81 be used for turning?
Any ideas how to solve this?? Please??

Jos Raven
Holland