Then I get an error message saying OMSI2 must be installed first to be able to run this VIENNA addon and close. ![]() The bad is the installshield wizard for the addon VIENNA doesn't provide a prompt to specify the STEAM OMSI2 install folder path. Then I transferred OMSI2 to STEAM and now I want to install VIENNA addon. ![]() I purchased some time ago via Aerosoft webstore the addon VIENNA and OMSI2 as downloadable install files.
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