Table of changes to convert DEFNODE control file to TDEFNODE. 
TDEFNODE has many more options, see manual

FC-format change, must be changed
MO-more options available
RM-option removed

If no NOTE for option, it should work as is.


DEFNODE NOTE		Function
BL: 			outline of elastic rotating plate 
BP: 			specify pole and strain tensor for a block (overrides BL: statement)
CF: 			connect 2 faults (remove overlap or gap from subsurface intersection of faults)
CL: MO			clear specified data type
CO: 			continue reading from input file (used sith SK: option)
DD: 			depth and dip to nodes (used only within FA:, fault input section)
EM: 			end of model input section
EN: 			end of input data
EQ: MO			equate two nodes on different faults (set their phi's equal)
FA: MO			fault geometry input
FF: 			fault flags (turn faults on and off)
FL: MO			set flags
FO: RM			change fault orientation and offset
FS: 			calculate relative block velocities at specified points 
FT: FC			fault parameterization type
FX: 			specify position of a particular fault node - overrides all other specifications
GD: FC, MO		specify Green's functions directory and interpolation step sizes
GI: 			lists GPS velocity field rotations (relative to reference frame) to be adjusted
GP: FC, MO		GPS input data file
GR: FC, MO		grid of vectors to calculate
GS: FC, MO		grid search controls
HC: MO			hard constraints
IN: MO			interpolation lengths for fault segments between nodes (for forward run)
MF: 			merge faults at T-junction
MM: RM (use SM:)	range of moment allowed
MO: 			model experiment name, used for output filenames
MV: 			move points
NN: MO 			node parameter index numbers (same as old NF:)
NV: 			node values (same as old NO:)
NX: 			fixed node indices
PE: 			scaling factors for penalty functions
PF: 			parameter I/O file for quick restart
PG: 			initialize pole of rotation for GPS vector file
PI: 			lists block poles to be adjusted in inversion
PM: 			parameter min and max values
PN: 			node z-profile parameter index numbers
PO: 			block pole of rotation values
PR: FC, MO		surface profile line
PV: 			node z-profile parameter values
PX: RM (use FT:)	fix node z-profile parameters
RE: 			reference block for vectors
RM: 			remove named GPS sites or blocks from data
RO: 			rotation rates data file
RS: MO			reference site for GPS vectors
SA: FC, MO		simulated annealing controls
SI: MO			strain rates tensors to be adjusted
SK: 			skip following lines of input data until a CO: line is encountered
SM: FC, MO		apply along-strike smoothing to fault coupling
SR: FC, MO		fault slip rate / spreading rate data file
SS: 			strain rate tensor data file
ST: 			initialize strain rate tensor values
SV: MO			slip vector / transform azimuth data file
TI: 			tilt rate data file
UP: RM (use GP:)	uplift rate data file
ZD: 			similar to DD: