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Starting IDL from rike command line produces :
 
rike:~/idl > idl
IDL Version 5.3 (sunos sparc). (c) 1999, Research Systems, Inc.
% Trial version expired.
% Entering timed demo mode for IDL. Each session is limited to 7 minutes
  of operation. Printing and file saving are disabled.
  
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No IDL license attached / available.
 
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On rike prompt, request license from pmas license server. Type :
 
slpmas
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If still unsuccessful, login to pmas and start IDL license manager, type :
 
lmgrd
Back on rike, repeat step from above:
slpmas
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Alternatively, request license from CAHA license server. Type :
 
slmpia