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my report can not run well.

384306Mar 20 2003 — edited Mar 21 2003

hi everyone.
i developered a application using 9ids forms and reports developer.one funtion of my programme is to call a report .i use web.show_document(ur,'blank').url is '../../servlets/RWServlet?report=test.rdf&desformat=PDF&userid=scott/tiger@orcl..'.
i don't install report server,i only install 9ids .several day before my application could run well ,the report called by my form could show right now.these two day when i run my application to call the report through my form ,the information of web is "the address of web is found,please wait'''" but the report does not show after i wait a long time.
it make me puzzle because i don't change my application a litter bit.why can it run well but now not?is it necessary to install a report server in order to call a report?if not,how can i deal with my problem?