You need to set up separate environments for your different Csound installations. If you do this, you will have no trouble running as many versions of Csound or your other software on the same computer as you like.

There are several ways of doing this, but the easiest way is use batch files that first set the required environment variables, then launch Csound or another application that you want to run in that environment, then "pause" so you can see what happened if it didn't work.

If your default environment has the wrong OPCODEDIR, in your batch file environment you can simply reset it. This will not affect the default environnent, just the "local" environment.

Hope this helps,
Mike

-----Original Message-----
>From: Art Hunkins 
>Sent: Sep 15, 2008 11:24 PM
>To: csound@lists.bath.ac.uk
>Subject: [Csnd] 5.09 Windows float installer anomoly
>
>Unusual new behavior upon doing above install.
>
>I have a special pared-down version of of Csound 5.06 installed in a single 
>folder, with my .csd files running (in Lettuce) completely within this 
>folder. No environment variables are needed or desired. Everything works 
>fine.
>
>I install 5.09 from the installer in a different location, complete 
>(unfortunately) with a set of environment variables. These variables, 
>especially OPCODEDIR, prevent my 5.06 system from running. The 5.09 
>environment variables take over, look for everything in the 5.09 folders, 
>and tell me everything is an incompatible version. (I expect that it's 
>OPCODEDIR pointing to 5.09.)
>
>To my knowledge this never happened before. The environment variables did 
>*not* "take over" my self-contained 5.06 installation.
>
>I really need to be able to run from a single folder regardless of what 
>other Csound installations may be on a given machine, or regardless of what 
>the environment variables are (I'm in XP here).
>
>My understanding is that first Csound looks for everything in the current 
>directory, and only if it does not find what it needs there, looks elsewhere 
>(according to environment variables). This does not seem to be happening 
>with 5.09.
>
>Please someone (Michael?) straighten me out.
>
>Art Hunkins 
>
>
>
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