Parts wrong position when export to STP or IGS

I imported a stp file and move some parts to another position, and then saved to prw first, and then exported to stp and igs files, and then i closed the file.
i open the prw file first, the parts position is right.
i import the stp file in Tetra4D reviewer then , the parts position is wrong.
i import the igs file in Tetra4D reviewer then , the parts position is right.
i import the stp file in other software like solidworks, the parts position is wrong, the position is the position before i moves
i import the igs file in other software like solidworks, the parts position is also wrong. the position is the position before i moves.

i don’t know why,
Tetra4D reviewer can not save the lasted modified position to export to stp or igs format?