River's lake emergency, always appear this error message, how to deal with? thank you-CodePudding

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River's lake emergency, always appear this error message, how to deal with? thank you

Time：11-09

CodePudding user response:

This is a null reference error;

CodePudding user response:

reference 1st floor milaoshu1020 response:

this is null reference error;

Then what should I do?

CodePudding user response:

According to the prompt, check code:
Class1. Vb file line 40;

CodePudding user response:

The

reference 3 floor milaoshu1020 response:

according to the prompt, check code:
Class1. Vb file line 40;

To solve, thank you for your advice!