You do not create the RTF, it is part of the forcefield (eg, top_all22_prot.inp).

Sorry, cannot help you further without more information.

Here is what I get when reading the protein RTF/PARAM files in the c35b3 release (your errors are NOT present):
CHARMM> read rtf card name /applic/charmm/c35b3/toppar/top_all22_prot.inp
VOPEN> Attempting to open::/applic/charmm/c35b3/toppar/top_all22_prot.inp::
MAINIO> Residue topology file being read from unit 90.
TITLE> *>>>>>>>>CHARMM22 ALL-HYDROGEN TOPOLOGY FILE FOR PROTEINS <<<<<<
TITLE> *>>>>> INCLUDES PHI, PSI CROSS TERM MAP (CMAP) CORRECTION <<<<<<<
TITLE> *>>>>>>>>>>>>>>>>>>>>>> DECEMBER, 2003 <<<<<<<<<<<<<<<<<<<<<<<<<<
TITLE> * ALL COMMENTS TO ADM JR. VIA THE CHARMM WEB SITE: www.CHARMM.ORG
TITLE> * PARAMETER SET DISCUSSION FORUM
TITLE> *
VCLOSE: Closing unit 90 with status "KEEP"

CHARMM> read param card name /applic/charmm/c35b3/toppar/par_all22_prot.inp
VOPEN> Attempting to open::/applic/charmm/c35b3/toppar/par_all22_prot.inp::

PARAMETER FILE BEING READ FROM UNIT 90
TITLE> *>>>>> CHARMM22 ALL-HYDROGEN PARAMETER FILE FOR PROTEINS <<<<<<<<
TITLE> *>>>>> INCLUDES PHI, PSI CROSS TERM MAP (CMAP) CORRECTION <<<<<<<
TITLE> *>>>>>>>>>>>>>>>>>>>>>> DECEMBER, 2003 <<<<<<<<<<<<<<<<<<<<<<<<<<
TITLE> * ALL COMMENTS TO ADM JR. VIA THE CHARMM WEB SITE: www.CHARMM.ORG
TITLE> * PARAMETER SET DISCUSSION FORUM
TITLE> *
PARMIO> NONBOND, HBOND lists and IMAGE atoms cleared.
VCLOSE: Closing unit 90 with status "KEEP"

$$$$$$ New timer profile $$$$$


Lennart Nilsson
Karolinska Institutet
Stockholm, Sweden