package linux-image-2.6.31-11-rt 2.6.31-11.154 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 127

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ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.31-11-rt 2.6.31-11.154
ProcVersionSignature: Ubuntu 2.6.32-26.48-generic 2.6.32.24+drm33.11
Uname: Linux 2.6.32-26-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Sat Feb 5 20:00:25 2011
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 127
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
SourcePackage: linux-rt
Title: package linux-image-2.6.31-11-rt 2.6.31-11.154 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 127