I an facing prob with `include "constants.vams" `include "di

OOL: ncvlog 10.20-p008: Started on May 13, 2019 at 02:31:25 IST
ncvlog
-use5x
-work __nclib
-view module
-logfile ncvlog.log
-cdslib /tmp/ihdl_cdslibf4519_4519
-messages
-nostdout
-nocopyright
-ESCAPEDNAME
/home/nanodc/veriloga_res.va
-NOCOPYRIGHT
-UPDATE

file: /home/nanodc/veriloga_res.va
`include "constants.vams"
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ncvlog: *E,COFILX (/home/nanodc/veriloga_res.va,3|24): cannot open include file 'constants.vams'.
`include "disciplines.vams"
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ncvlog: *E,COFILX (/home/nanodc/veriloga_res.va,4|26): cannot open include file 'disciplines.vams'.
electrical p,n;
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ncvlog: *E,EXPLPA (/home/nanodc/veriloga_res.va,8|12): expecting a left parenthesis ('(') [12.1.2][7.1(IEEE)].
electrical p,n;
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ncvlog: *E,EXPLPA (/home/nanodc/veriloga_res.va,8|14): expecting a left parenthesis ('(') [12.1.2][7.1(IEEE)].
I(p,n)<+ V(p,n)/resistance;
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ncvlog: *E,EXPSMC (/home/nanodc/veriloga_res.va,10|7): expecting a semicolon (';') [12.1.2][7.1(IEEE)].
I(p,n)<+ V(p,n)/resistance;
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ncvlog: *E,EXPSMC (/home/nanodc/veriloga_res.va,10|15): expecting a semicolon (';') [12.1.2][7.1(IEEE)].
I(p,n)<+ V(p,n)/resistance;
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ncvlog: *E,EXPLPA (/home/nanodc/veriloga_res.va,10|26): expecting a left parenthesis ('(') [12.1.2][7.1(IEEE)].
module __nclib.resistor1:module
errors: 5, warnings: 0
Total errors/warnings found outside modules and primitives:
errors: 2, warnings: 0
TOOL: ncvlog 10.20-p008: Exiting on May 13, 2019 at 02:31:25 IST (total: 00:00:00)