The search server is unable to accept the propagation because there is insufficient free disk hard space.
To resolve this issue execute the following steps:
Ensure that the content index server has sufficient free hard disk. To review the current free space utilization on the computer start the following view:
Start Disk Capacity View
If necessary Increase the amount of free hard disk space.
Once done, restart the SharePointPSSearch service. The service can be stopped and restarted using the following tasks:
Stop Search Service
Start Search Service
For information about the SharePointPSSearch service, see the Microsoft Office SharePoint Portal Server 2003 Administrator’s Guide.