If you encounter issues while working with the IDEA plugin, please report them to Jira in PFAUT project. Partners or customers can raise a ticket to the Support portal. If possible, add a screenshot or attach the IDEA log file to the message. The log file is located at Help > Show Log in Files/Explorer/Finder; idea.log is the current log file.
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Why Auto-completion Is Not Working?
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Have you added the Pricefx Framework support? You should Upgrade Studio Upgrade Instructions for the Project Libraries when a major Studio or PFX versions are released.
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Invalidate caches: File > Invalidate Cache / Restart > InvalidateClear file system cache and Local History
Close IDEA.
In the OS, delete IDEA config files of the project:
Browse to the project folder.
Find the .iml file in the project root and delete it.
Find the .idea folder in the project root and delete it.
Reopen the project in IDEA.Invalidate and restart IDEA: File > Invalidate Cache / Restart > Invalidate & Restart
Code Reference Info:
https://www.jetbrains.com/help/idea/viewing-reference-information.html