Hi
There will be two reasons to get these type of errors
1. The path mentioned will be wrong
2. You might me using db (which was generated with later version ) when compared to version you are using for synthesis
* source your .synopsy-dc.setup file which has the path (search path, link and target libraries specified)
* try to change the version to the latest if available.
* Dont use the absolute path, give the full path to read in the file
* In case if the RTL calles libraries, check whether you have the DCOBj created in the same version of which your are using to readin the RTL
* check reading the RTL with "analyze" command.