Also I tried
call "HCP"."HCP_GRANT_ROLE_TO_USER"('sxxxxxxxxxxtrial.mysapxshana.perslist::model_access','sxxxxxxxxx')
I got this
15:48:05 >> Statement: 'call "HCP"."HCP_GRANT_ROLE_TO_USER"('s0xxxxxxxxtrial.mysapxshana.perslist::model_access','sxxxxxxxxx')'.Error calling procedure: defined error exception: Using schema _SYS_BIC is not allowed. Schema level privilege is allowed only for you dev schema!