Not a valid limit in NIntegrate ???

*To*: mathgroup at smc.vnet.net*Subject*: [mg3119] Not a valid limit in NIntegrate ???*From*: a_kowald at chemie.fu-berlin.de (Axel Kowald)*Date*: Fri, 2 Feb 1996 23:31:15 -0500*Organization*: Kristallographic Institute FU Berlin*Sender*: owner-wri-mathgroup at wri.com

Hi FindRoot[NIntegrate[t,{t,rho,100}]==1,{rho,99}] NIntegrate[t,{t,rho,100}] /. rho->99 When I'm using one of the above constructs either on a Mac or under Unix running Mathematica 2.2 I get the following error message: NIntegrate::nlim: t=rho is not a valid limit of integration Why does it complain ?? Any ideas ?? Many thanks Axel Kowald ==== [MESSAGE SEPARATOR] ====