Error while opening .uxp file

Dear All,
I am facing following error when I reopened a saved .uxp experiment.

Error loading wave file: “TTtoPS.ibw”
the file or folder could not be found.
The wave may be needed to recreate a graph, table or other object in the experiment.
Do you want to look for the wave file?

Also for “TTPSFNames.ibw”,PSSymbolNames.ibw".

Any idea what went wrong between different day. I am not sharing any waves with any other experiment.

Thanks in advance for your help.

Best,
Maniraj