Hi Expert, Below is the response I got.Here hostname of the backend server ( srmhost ) is returned in the error. ---------------------------------------------------------------------------------------------------------------------- Error application is coming up. 20101009 BASIS 134815 srmhost http://srmhost.xyz.com:8000/sap/bc/webdynpro/sapsrm/wda_l_fpm_oif/ OBJECTS_OBJREF_NOT_ASSIGNED_NO Access via 'NULL' object reference not possible. Method: /SAPSRM/IF_CLL_MAPPER~REFRESH of program /SAPSRM/CL_CH_WD_DODM_WKL_SRCHCP ----------------------------------------------------------------------------------------------------------------------------------- If I want to replace srmhost by srmdevarp05 in above response , How can I do it? Best Regards, Tushar |