Error en crystal report dotnet1\crdb_adoplus.dll

De la nada me aparecio este error, ya que el sistema estaba ejecutandose bien:

"Could not load file or assembly 'file:///C:\Program Files\SAP BusinessObjects\Crystal Reports for .NET Framework 4.0\Common\SAP BusinessObjects Enterprise XI 4.0\win32_x86\dotnet1\crdb_adoplus.dll' or one of its dependencies. The system cannot find the file specified."

Buscando en internet  con esto pude solucionar, agregando en mi App.config

< startup useLegacyV2RuntimeActivationPolicy="true">
< supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
< /startup>

Fuente:http://www.codeproject.com/Questions/631537/Could-not-load-file-or-assembly-file-C-Program-Fil

Saludos
Adalberto Montanía