There's nothing in compound indexes itself that would increase a chance of corruption but they do increase size of the index file itself. Did you look into other ways to improve performance?

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>We are using compound indexes to improve our data access speed which has improved. We are sometime getting our indexes corrupted and don't know if it's related.
>Does anyone have any experience or knowledge about the "does and don'ts" of using compound indexes? Are they OK to use or are there reliability issues.
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>Examples of indexes I'm using:
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>*----- Views Defined for Compound Indexes
>INDEX ON STR(iCustomer_Masteriid) + ctrans_type + cTrans_No 					 TAG CDX_1
>INDEX ON STR(iCustomer_Masteriid) + ctrans_type + cTrans_No + STR(iapply_seq) + cRate_Table_Code TAG CDX_2
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