FPLibrary: System ran out of Memory

I'm using the Java 3.2.661 SDK to run our Centera process. The process initially purges all clips that have surpassed the retention period before it proceeds to write new clips. Recently, I've been getting the following exception (sometimes CORE dumps too):

On the attempt to create a new FPClip to start purging:

            _clip = new FPClip( pool, _clipid, FPLibraryConstants.FP_OPEN_ASTREE );

I get the following exception:

03/31/2009 20:31.13   Purging Clip ID: 0U8R7J05K82H1e9H5MNMV2ASIMF
03/31/2009 20:41.18   com.filepool.fplibrary.FPLibraryException: System ran out of memory
03/31/2009 20:41.18 com.filepool.fplibrary.FPLibraryException: System ran out of memory
        at com.filepool.fplibrary.FPClip. (Unknown Source)
        at ***.***.ComplianceServer.SimpleClip. (SimpleClip.java:49)
        at ***.***.ComplianceServer.ContentProvider.getCurrentClips(ContentProvider.java:154)
        at ***.***.ComplianceServer.ContentProvider.purgeClipID(ContentProvider.java:322)
        at ***.***.ComplianceServer.ContentManager.runScheduledPurges(ContentManager.java:120)
        at ***.***.ComplianceServer.ContentManager.runPurgeAndWrites(ContentManager.java:60)
        at ***.***.ComplianceServer.ContentScheduler. (ContentScheduler.java:12)
        at ***.***.ComplianceServer.ContentScheduler.main(ContentScheduler.java:19)

My memory allocation for Java is "-ms512M -mx 1024M". I've never had a problem with this process for the last

3 years. Now it fails on this PURGE. Other times it just CORE dumps on this line.

Any idea what is happening? Thanks.