Null pointer error when saving member

A co-worker received the following message while trying to save a source
member from RSE:

RSEF1002E: Operation failed. File system input or output error.
Message reported from file system: java.lang.NullPointerException

Here's the .log entry:
!SESSION May 25, 2004 10:25:09.810
---------------------------------------------
java.fullversion=J2RE 1.3.1 IBM J9 build 20030702 (JIT enabled)
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
Command-line arguments: -os win32 -ws win32 -arch x86 Files\IBM\WebSphere
Studio\Site Developer\v5.1\.\eclipse\eclipse.exe -data C:\Documents and
Settings\EKing\My Documents\IBM\wdsc\workspace -feature com.ibm.wdsclient
-install file:C:/Program Files/IBM/WebSphere Studio/Site
Developer/v5.1/eclipse/
!ENTRY com.ibm.etools.systems.core 4 0 May 25, 2004 10:25:09.810
!MESSAGE RSEF1002E: SUB#0:java.lang.NullPointerException


Here's what was done:
1) opened member
2) made some changes
3) pressed save button
4) Click the X to close member
5) Dialog box saying changes had been made, offered choice to save.
6) Pressed save
7) ****error!****

Also, the changes were lost.  Is the any way to recover them?

Thanks,
Charles