March 23, 20206 yr Hi everyone, I buid the pmdg 777 and 737ngxu for p3d v4 but I can't downnload liveries. When he finished to install a livery, there is a error : "Installation failed. The underlying errore message was : Sorry, I was unable to open one or more necessary files" Can some one help me? Thanks everyone
May 3, 20206 yr Hello, This problem can be solved by running PMDG Operations Centre v2 as administrator.
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