Hi Touchdesigners! What means this error??
Inside the container, don’t have any error…
I can’t fix it… If i changing the container, still there… Help me please!
Thank you very much! 
it means that the value which you entered for the parameter: “Operator Viewer” is not correct.
It looks like the value you have entered is “./variables”
So that means that the parameter mode should be set to constant, not to python expression (click the first square, the parameter value should not be blue)
incorrect:
correct:
Thanks Nettoyeur! but, is a Container, is not a PO viewer, is a Container… Is strange. Inside don’t have a any OP viewer… 
Thank you!
If you post your .toe file it would be easier to give an answer!