spring-aop not found whilst building spring framework 2.5.4

Hi,

I'm building Spring Framework 2.5.4, with Java 1.6.0_06 and Ant 1.7, using the 'alljars' command.

On reaching line 498 of build.xml the build fails with the following message:

Quote:

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c:\spring-framework-2.5.4\jarcontent\spring-aop not found.

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What is the best way to resolve this issue?

Many thanks in advance.