IllegalArgumentException : After running mod after 3 months

[Anonomys]

So, I bought a new pc re-imported everything from my old one, and when I tried to run my mod I just saw this : 

Spoiler

Exception in thread "main" java.lang.IllegalArgumentException: Environment variable 'assetDirectory' must be set to a valid path.
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:70)

I also got this :

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by net.minecraftforge.userdev.LaunchTesting (file:/C:/Users/Victor/.gradle/caches/forge_gradle/minecraft_user_repo/net/minecraftforge/forge/1.15.2-31.1.30_mapped_snapshot_20200331-1.15.1/forge-1.15.2-31.1.30_mapped_snapshot_20200331-1.15.1-recomp.jar) to method java.lang.ClassLoader.initializePath(java.lang.String)
WARNING: Please consider reporting this to the maintainers of net.minecraftforge.userdev.LaunchTesting
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

 

Can anybody help me, because this is my first time seeing this error message.

Edited June 7, 2020 by Anonomys

[sciwhiz12]

What version of Forge and what IDE are you using?

[Anonomys]

1.15.2

[sciwhiz12]

1 minute ago, sciwhiz12 said:

what IDE are you using?

 

[Budschie]

The problem is, that, as it says in the exception message, an environment variable isn't set properly.

[Budschie]

I think assetDirectory should point to your asset directory, which is most probably not the case.

[Budschie]

I remember that it was a pain to switch the location of the mod files back when I developed in MC version 1.12.2, because Eclipse had some problems finding the right folders etc.

But that shouldn't be a problem anymore.

Edited June 7, 2020 by Budschie

[sciwhiz12]

It seems that you moved the files, but you haven't refreshed your launch files for your IDE.

Remove the old launch files, then run:

For Eclipse: gradlew genEclipseRuns

For IDEA: gradlew genIntellijRuns

For VS Code: gradlew genVSCodeRuns

[sciwhiz12]

The second error is, if I am correct, from running the Forge dev client/server on Java 9+. It can be safely ignored.

[Anonomys]

okay thanks.