Extension of BASIC & SYNTAX ERROR

Hi!

I'm working on own extension of BASIC7.

I have finished some commands, but...

If command has no parameter everytime all is ok.
When I add any parameter, e.g.:
$10 (directory drive #10)
... code works ok, but final output after directory is ?SYNTAX ERROR.

As I know on C64 is possible to disable output errors:
POKE768,139 - enables
POKE768,64 - disables...

Also I want to ask how to include to code that RUN/STOP stops listing etc..
On C64 it works with implementing JSR $A82C

I'm grateful for every help.

Miro

...but I solved problem with errors that if is my command used (I manage my own errors), I rerouted vector on $0300 to $4db7.

If is used standard, or no my command, I reroute this vector back to default.

So are managed errors correctly.

What I'm searching for is routine which enables to stop ML program with key RUN/STOP.
C64 has this routine, as I wrote...

But also thanks - if I didn't manage own errors, solution is impossible...

Miro