After use the Oracle Navicat import function function displays a red x

The figure is plsql screenshots

There may be no Navicat caching process, refresh try does not work, to function import can be recompiled.

Also a problem is found, the script Navicat exported inside, there is not even part of the function parameters and return values, so I am very puzzled, and finally exported functions through plsql stored procedures run in Navicat generated.