Mark B. The PR3 TFs that failed before (5191) ran fine when restarted with the typo fixed (the call to Matlab_TFs() had invoked model hsts_metal, not hlts metal): Undamped: ^/trunk/HLTS/H1/PR3/SAGM1/Data/2013-01-21-1042830122_H1SUSPR3_M1_0p01to50Hz_tf.mat Damped: ^/trunk/HLTS/H1/PR3/SAGM1/Data/2013-01-21-1042852645_H1SUSPR3_M1_0p01to50Hz_tf.mat The damped plots are all fine. The undamped plots are rather noisy in L, P and Y, and the fundamental pitch mode (0.66 Hz) has pretty much disappeared in P and L. Probably needs a look over and another round of TFs.