1 02/21/85 is_legal_proj
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 4 Syntax as an active function:  [is_legal_proj Project_id]
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 7 Function:  returns "true" if its argument is listed in the current SAT
 8 copy (smf.cur.sat) in the user's working directory, or it returns
 9 "false" otherwise.
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12 Notes:  This function is used in the master.ec segment to detect errors
13 in the input arguments.