Hi Amal,
then please check the enviroment variables for the user,
env | grep PATH
there should be /sapmnt/UHR/exe or /usr/sap/UHR/SYS/exe/run
if not you can manuall add it to the .cshrc by adding the following line
for csh
setenv PATH /usr/sap/UHR/SYS/exe/run:$PATH
or for ksh
export PATH=/usr/sap/UHR/SYS/exe/run:$PATH
if you only want to set it for the active session you can just run the following from the command line
for csh
setenv PATH /usr/sap/UHR/SYS/exe/run:$PATH
or for ksh
export PATH=/usr/sap/UHR/SYS/exe/run:$PATH
Best Regards
Marius