Fail to save package file : class not registered

Problem:

Sometime a user may encounter an error like below while creating a SSIS package from BIDS.

Error creating package

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ADDITIONAL INFORMATION:

Failed to save package file "C:\Documents and Settings\UserName\Local Settings\Temp\tmp87.tmp" with error 0x80040154 "Class not registered".

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Solution:

To solve this try to register below DLLs by typing below commands in CMD promopt:-

regsvr32 msxml3.dll
regsvr32 msxml4.dll
regsvr32 msxml6.dll