Hi guys,

I am new to Pd, and I have just implemented a function to calculate the zero crossings. The problem is, I am using the [tab_sum] object from the [iem] library which worked fine, however, when I close Pd and open it again, and open my abstraction, the [tab_sum] object becomes red with the error "couldn't create", and Pd only recognises it when I open the help page for this object from the help window.

Any ideas for what is happening?