Some VIs can't be opened any more

Question

Other anomalies before the failure occurend:
1. An error message appeared each time I was opening my main VI: Windows cannot find "".
LabVIEW did however load the file anyway(!) and run properly.
2. Some subVIs could not be found without assistance. This occurend after I hand checked out and in again a VI using FtpVC, se below.
Possible error trigger:
I was tying a version handling tool called FtpVC just before the error occured. It does make files read-only but does not merge or alter the files. (The file I checked out and in again can still be opened in LabVIEW).

Answer 1

Thankyou for your answer.
Actually I found out that it was an Application Builder error that caused my problem not the version control program as I had first assumed.
The solution to "Linker.ccp Error Line 2075 When Creating Executeable with Application Builder" did also work for Linker.ccp Error Line 2022 when creating dll with application builder, se http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/87b349f1f9db689e86256c910082e85b?OpenDocument.
Regards @nders