If you are running a SAS procedure in SAS 9.2 and within the code you press F1 to invoke help, you will always be prompted to rebuild the index. For example, when running the GLM procedure and pressing F1 in the middle of the code to get help, SAS will always display Preparing index for first use.

proc glm; 
      class A B; 
      model Y=A B A*B; 
run;

In some cases, the helps displays No Topic Found. If you open the help from the SAS menu and locate the particular procedure, however, information is available.

This issue did not happen in SAS 9.1.

In SAS 9.2 the temporary solution is to use SAS help from the Help menu.

This issue is fixed in SAS 9.3.

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