When trying to install client and/or server on Pharo 10259 (squeakmap)  I get the following message:

MessageNotUnderstood: UndefinedObject readOnlyFileNamed:

SARInstaller fileIn


I've tried earlier versions and get the same message.  Can anyone recommend a particular combination of versions that will install?  I am extremely interested in the later enhancements (r4.2) and would prefer to load the latest.  Any success?    Thank you for taking the time.

Tim