All settings was done according to this manual. Validation performed without errors.But when I press button "Preview source file", I get error @DMF1407 (Package execution failed please check eventlog.).Windows Event viewer gives more information about this error:<?xml version="1.0"?><Errors><Error><ErrorCode>-1073450823</ErrorCode><SubComponent>SSIS.Pipeline</SubComponent><Description>"Flat File Source.Outputs[Flat File Source Output]" contains no
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