HP MLIB User's Guide Vol. 2 7th Ed.

572 HP MLIB User’s Guide
CRC2FT/ZRC2FT Real-to-complex two-dimensional FFT
ier Status response:
ier = 0 Normal return—transform successful.
ier = −1 l1 ≤ 0.
ier = −2 l2 ≤ 0.
ier
= −3 ldz < l1.
ier
= −4 Probable error in ldz or dimensions
of z.