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I'm using a Web Service to get Data from PostgreSQL DB. In the local PC it work fine. Once in the Test Server I am getting the following message

"Unable to cast object of type 'CoreLab.PostgreSql.PgSqlCommand' to type 'System.Data.Common.DbCommand'."

Any help would be appreciate

Thanks
Galina

Seemingly, you have CoreLab.PostgreSql.dll for .NET Framework 1.x on the Test Server. Please check and substitute it with CoreLab.PostgreSql.dll for .NET Framework 2.0.