Is there some reason why PSPP does not use the same syntax as SPSS? For example, the SPSS syntax for a 1-sample t-test is:
T-TEST
/TESTVAL=15
/MISSING=ANALYSIS
/VARIABLES=dollars
/CRITERIA=CI(.95).
But this will give an error in PSPP. PSPP uses CIN(.95) rather than CI(.95). I hope this is a bug and not intentional.