I have a 15 tool changer and a tool probe.  I have written macros that do the tool change and set tool offset.  But when I try to put the tool change macro inside another macro - all **** breaks loose.  Is it a matter of using the proper entry and exit sequences?  Or will it never work.  I could of course make a giant macro that does both - sets all 15 tools.  But it would be nice if one macro could call another.

to call a macro within a macro is a nogo in Mach3, i think it is written somewhere in the documantation.

a good alternative is to us the #expand instruction of cypress.

for example create a file mylibary.m1s in your macro Folder, put some code (Sub's or function's) in:

Public Sub DoThis()
MsgBox "Sub DoThis was called"
End Sub

Public Sub DoThat(ByVal X as Long,ByVal Y as Long)
MsgBox "Sub DoThat was called with parameter X: " + CStr(X) +" parameter Y. " + CStr(Y)
End Sub
 
Public Function DoThiswithreturn (ByVal X As Integer) As Boolean
If X > 100 Then
DoThiswithreturn = true
Else
DoThiswithreturn = false
End If
End Function  

put at the end of your macro witch whants to use this routines this:

#Expand <\..\..\macros\Mach3Mill\mylibary>


sample for macro would be:

Sub Main
Dim RetValue As Boolean

DoThis

DoThat 1,2

RetValue = DoThiswithreturn(50)
MsgBox RetValue

RetValue = DoThiswithreturn(150)
MsgBox RetValue
End Sub


#Expand <\..\..\macros\Mach3Mill\mylibary>  


you can use this exand in all macros witch whant to use the same routines.

The best bet is to do everything in your M6 macro, rather than multiple macros.
Or do what TPS said.