#1617 System ERROR: E_INVALIDARG. Make it useful and say which exatcly it is

[Sam Tansy]

By example of zip encryption

7z a -tzip -mx0 -p"pass" -mem=AES256 secret.zip secret.txt

I tried to do it with 7-zip.

7z a -t7z -mx0 -p"pass" -mem=AES256 secret.7z secret.txt

and filed with

System ERROR:
E_INVALIDARG

And then perplexed by this error I tested every possible argument and eventually found a problem. Now, to the point - It sounds like VC compilation errors: error CS0305. Very smart, Very useful. ¯\_(ツ)_/¯

It would be better, more descriptive and user friendly if this argument was saying which argument exactly is invalid.

[Igor Pavlov]

No way now.
Because there is no interface for text error string between 7z client program and zip handler code when clients sends parameters to zip handler.
Zip handler can return only error number (HRESULT): E_INVALIDARG.