Justin, Regarding your "pbuf_flush" problem with the pqact(1) utility: would you be willing to try a new release-candidate version of the LDM? In it, the way the pqact(1) utility handles file descriptors has been considerably modified and might solve your problem. The release-candidate is ftp://ftp.unidata.ucar.edu/pub/ldm/ldm-6.4.2.4.tar.Z Regards, Steve Emmerson