error about c3d related

I have a series of c3d file, some of them are good and can be run successfully in anybody. However when I put some others in anybody model, there is error saying:
Defined at D:/…/CreatMarkerClassTD.any:‘PosInterpol’:Unresolved object.

I really want to know what can I do for this situation? Should I modify the c3d file? what may be the problem.
Thank you for your help:)

Hi,

it looks like you have a marker that is not defined. Can you compare the markers in the C3D files that are running and the files that bring this error message to see if there are different markers.