LabView load error code 21: An external subroutine required for execution could not be found.

[cksys]

I'm trying to build a standalone executable vi using the Build Application in LabView 6.0.2. All my vi's and subvi's are in a library with a chosen top level vi. After finished building the standalone executable vi, I installed into a target computer. When I ran the standalone executable vi it gives me this error. "An error occurred loading VI '.....'. LabView load error code 21: An external subroutine required for execution could not be found".
Can anyone please tell me how to fix this problem? Thanks in advance.

[Dennis_Knutson]

First of all, make sure that if you're using DAQ/VISA that these are installed on the target computer. The application builder does not include these files. Also, if you dynamically call any VIs, you'll have to manually add these to the list of source files in the app builder.