Problems importing Drawings of Asm files in Productpoint

When I'm trying to import files in from my file system and then save them into PP i have problems that PP informs me that it couldn’t find some files that is not used in the drawing. The files it refers to is a prior temporary name of some of the parts that is used in the asm drawing. PP would like to insert a placeholder for the parts. Is there any way to get around this? /Ola Örnhed