I2C and MCP23016

[keymuu]

I could get the MCP23016 to work reliably only by removing the timing capacitor (33pF) all together.

Thanks Eggman!

When I removed that capacitor the program goes to the error-label, so that does not solve my problem
I soldered a new 33pF on the PCB and got rid of the error label jump but the original problem remains...

I'm puzzled, I do not know what I should try next!

Any other suggestions?