Thank you very much Prof. Lennart.
I've checked the format dcd file, as you mentioned.
In my case c29b2 writes little_endian and c32b1 writes big_endian. After I changed dcd file (from c32) in big_endian format to little_endian (or little, c29, to big) but still can not analyse both trajectories together.

PROT 110 VAL HN - PROT 106 ILE O 5.00 250.00
PROT 111 ARG O - PROT 114 ALA HN 5.00 250.00
PROT 114 ALA HN - PROT 111 ARG O 5.00 250.00
***** ERROR ***** HEADERS DO NOT MATCH ^A^@^@ CORD VELD
*** LEVEL -1 WARNING *** BOMLEV IS -3

I have no idea how to deal with the header. Please help. Thank you.