Error writing to TAG.vaIue: Bad

when i connect tia portal to ignition by nettoplcsim
then when i add tags it gives me this error how i can fix it ?

I don't know anything about TIA Portal, but the first question that anyone is going to ask you is to provide a screenshot of your driver configuration. How do you have it connected. The screenshot you provided doesn't provide much information.

Hi,

The error message is just a consequence, it tells you that Ignition tried to write a tag (maybe OPC) and this one is bad.

I think your connection is faulted, or your tagpath is wrong.

What is your configuration inside your gateway ?
Have you check the address IP in your connection ?