1740843 - "It was not possible to open the information space. Can't load the information space index. (PS 50301)" when trying to display any Information Space

•  Error : "It was not possible to open the information space.  Can't load the information space index. (PS 50301)” when clicking on any Info rmation Space in SAP BusinessObjects Enterprise XI 4.x
• Details:
  C:\Program Files (x86)\SAP BusinessObjects\SAP BusinessObjects Enterprise XI 4.0\Data\Polestar\index\LM_BI403.ExplorerExplorationServer\Published\ExplorationIndexes\2863aa23-7401-4b2d-9c4b-8a89deedfdac\2012-07-05_12.50.30.666\ExplorationSpaceDescriptor (The system cannot find the file specified)
• Click on the Information Space again and nothing happens

Note that folder 2863aa23-7401-4b2d-9c4b-8a89deedfdac is a random name generated by the system  and  2012-07-05_12.50.30.666 correspond to the Indexing date and time of the Info Space.

• SAP BusinessObjects Business Intelligence Platform 4.x
• SAP Explorer BI 4.x
• All windows

Information Space, BI4, Explorer 4, PS, 50301, index, load , KBA , BI-RA-EXP , Obsolete: Polestar, Explorer , Problem