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Forum Index : Microcontroller and PC projects : can MM.MESSAGE$ be cleared?

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wolfme
Regular Member

Joined: 26/10/2021
Location: Germany
Posts: 43

Posted: 07:43am 19 Apr 2026

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Hi,

can i manually clear mm.message$?
E.g. set it to "".
If yes, how?
If no, when is mm.message$ cleared?

Wolfgang

phil99

Guru

Joined: 11/02/2018
Location: Australia
Posts: 3151

Posted: 08:14am 19 Apr 2026

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Quote ... They are reset to zero and an empty string by RUN, ON ERROR IGNORE or ON ERROR SKIP.

An experiment you could try.
Put ON ERROR SKIP above a statement at a suitable point in a program after a deliberate error then Print MM.ERRMSG$.
Eg.

'... Various statements
ON ERROR SKIP
statement with a deliberate error
Print MM.ERRMSG$
'... Various statements
ON ERROR SKIP
If MM.ERRMSG$ = "" then Print "No error message"

Edit.
Yes, that works.

Well it did eventually after making some stupid mistakes!
Edited 2026-04-19 19:00 by phil99

wolfme
Regular Member

Joined: 26/10/2021
Location: Germany
Posts: 43

Posted: 11:13am 19 Apr 2026

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Thanks, i'll try that.

phil99

Guru

Joined: 11/02/2018
Location: Australia
Posts: 3151

Posted: 11:53am 19 Apr 2026

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Here is my test.

'Test clearing error messages.
On error skip
SetTick 200,Show_Pos 'this Sub does not exist
Print "An Error Occured = ";MM.ErrMsg$
On ERROR SKIP
Stepper close 'Stepper was never opened
Print "An Error Occured = ";MM.ErrMsg$
On error skip
If MM.ErrMsg$ = "" Then Print "Error message cleared"
Print MM.ErrMsg$
Print "finished"
End

Output

> RUN
An Error Occured = Cannot find label
An Error Occured = Stepper not initialized
Error message cleared

finished
>

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