Error: The operattion select list cannot accept the arguments [0] and [1]

Hello

When I test my app i get the error message: The operattion select list cannot
accept the arguments [0] and [1]"

Does this mean I use an sting in a mathematical thing or revesed?

The blocks i think are wrong:

Do you know what is the problem?

thank you in advane

Insufficient information to debug.

Supply us with an English version of the Source, or wait for some one who speaks your language.

(Canned Reply: ABG- Export & Upload .aia)
Export your .aia file and upload it here.

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use Do it to debug your blocks, see also tip 4 here App Inventor: How to Learn | Pura Vida Apps
see also Live Development, Testing, and Debugging Tools
Taifun


Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by icon24 Taifun.