Hello,

Using Ivy 2.5.0 rc1 and  2.4.0, I had very often encountered a retrieve issue 
with the exception:  java.lang.UnsupportedOperationException...

I had debug it, it comes from
org.apache.ivy.util.FileUtil.java

184 existingChild.remove(childDest);

To fix it

Line 174 existingChild = new 
java.util.LinkedList<File>(Arrays.asList(children));



Encapsulate arraysList as linkedList to be able to apply remove(File) 
function.(ArrayList fixed size cannot apply remove(File ) on it 
=>unsupportedOperationException)

                If someone could do the modification or tell me how to submit 
it, it will be great.

Thanks.

Regards

[Thales]
Patrick Enjolras
DIS BPS R&D Engineer
Tel.: 01 55 01 59 61

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