3.5.0-beta.4 Unknown variable error with M99

[stuartofmt]

Below is a skeletal macro (/sys/M3000). When called with M3000 (no parameters) it throws an error.

Note that it reports the error at line 10 as opposed to line7

When called with abort instead of M99 , it completes without error.

What is the expected behavior of M99 ?

; macro  /sys/M3000.g
; check if B parameter sent
if !exists(param.B)
  M99
  ;abort "M3000  -- No parameter was passed."
  
set var.Bparam = param.B

if var.Bparam = "Init"
    echo "Init"

elif var.Bparam = "Clear"
    echo "Clear"

elif var.Bparam = "Del"
    echo "Del"
else
    echo "Ordinary"

I stumbled on this trying to use M99 like a 'return' statement (several in the same macro). e.g.

if 
  <do something>
  M99

if
  <do something>
   M99

if
  <do something>
   M99

<do something>

I ended up refactoring (as per the example) as an if - elif -elif .... structure to eliminate the use of M99 because the behavior was unclear.

[gloomyandy]

@stuartofmt What board is this running on?

[stuartofmt]

@gloomyandy said in 3.5.0-beta.4 Unknown variable error with M99:

@stuartofmt What board is this running on?

SBC

Pi - Duet3D Buster Image. Did a sudo apt update && sudo apt dist-upgrade today

[dc42]

@stuartofmt this works for me in standalone mode, so I think is has to do with M99 processing in DSF. I'll ask @chrishamm to take a look.

[chrishamm]

@stuartofmt Thanks for reporting this, I could reproduce and fix this.