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Hi,
step by step
1. Testing program in pic18f46k22 - working OK
2. Change processor type to pic18f26k22
3. setting i2c for new processor
4. start program in 18f26k22
5. Program not working and delay 5s - pic18f26k22 stoped I2C bus. Example connecting pcf8574 to bus not working.
PCF8574 is ...

Im using chanell 1 - pin connect OK.
after start about 5 sec i2c bus communication stoped.

Hello,
I am using pic18F46k22 for I2C slave - working OK. If change CPU to 18f26k22 communication not working. Programs is same in boths CPU.

I have problem reading analog port AN0.
An1-An6 - port read value correct.
If change voltage in port AN0, An1 - An6 change value.
I'm thing problem in setting Vref-