these lines randomly appear in output window

[GertC]

Hello Gintaras,

For some time I find these 4 lines at random moments appear in the output indicating an error, but  without any link to code.
Do they ring a bell ? Please let me know.

Error in expression: ...st
Error in expression: ...exst
Error in expression: ...st
Error in expression: ...exst

[Gintaras]

When fails to evaluate an expression in a string at run time. Probably in toolbar options. Example:

Toolbar Toolbar94

Code:

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;/mov 5+st