Solution : https://service.sap.com/sap/support/notes/1146580 (SAP Service marketplace login required)
Key words : 
---------------------------------------------------------------------- ii/ important general information ----------------------< d042388 aug/17/09 >-----------------------------support package stack level equivalence, cx_sy_dyn_call_illegal_funcabap program           cl_enh_tool_badi_impl=========cpapplication component  bc-dwb-cexdate, 0 including enhancement package 1 sp2 / sp3 / sp4 orto sap netweaver 7, /<dvd mount directory>/startup jce_policy_zip=<policy zip archive>windows, application-specific update toolboxthe application-specific update toolbox, exchange file <upgrade tool>\sdt\lib\sdt_dsusrv, /sdf/rz20_tmpl_p /sdf/rz20_tmpl_n /bdl/cust_tree, prepare phases------------------------< d030559 07/jun/10 >--------------------------preventing long runtime, category               abap programming errorruntime errors         call_function_not_foundexcept, sap note 1248905------------------------< i008817 10/jul/07 >------------------------sap netweaver bi
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