#8 error message - old project uncompatible

[Anonymous]

i have just installed VDKBuilder 1.2.5 and am trying
to open a projects made previously with vdkb1.0.5

i am getting this error message

$./iopage: Symbol '__ti9VDKObject' has different size
shared object, consider re-linking segmentation fault.

what is the problem?
how is it solved?

thanks marc