Example of problem
The ITRF2014 file contains an incorrect transformation definition for ITRF97. The +d parameter is used when it should be +s.
The incorrect line is:
+proj=helmert +x=0.0074 +y=-0.0005 +z=-0.0628 +d=0.0038 +rz=0.00026 +dx0.0001 +dy=-0.0005 +dz=-0.0033 +ds=0.00012 +drz=0.00002 +t_epoch=2010.0 +convention=position_vector
It should be, accroding to https://itrf.ign.fr/en/solutions/transformations:
+proj=helmert +x=0.0074 +y=-0.0005 +z=-0.0628 +s=0.0038 +rz=0.00026 +dx=0.0001 +dy=-0.0005 +dz=-0.0033 +ds=0.00012 +drz=0.00002 +t_epoch=2010.0 +convention=position_vector
Problem description
there is no such options as +d and +dx0.0001, should be +s and +dx=0.0001