How to show error which happens in InstallLib macro

[kichik]

The compiler output contains the string passed to !error. For example, a simple script that contains only the following:

code:
!error "testing !error message"

Will result in:

!error: testing !error message
Error in script "test.nsi" on line 1 -- aborting creation process

If your installer crashes, it's most probably a problem with your DLL. Unless the details show the crash happened in the main module - the installer itself, it's in the DLLs.