# 22. Virtuoso Functions Guide - VAD_CHECK_INSTALLABILITY

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## VAD_CHECK_INSTALLABILITY

Checks the presence and correct versions of required packages and of the Virtuoso platform
varchar DB.DBA.VAD_CHECK_INSTALLABILITY (in package_uri varchar);
Description

Checks the presence and correct versions of required packages and of the Virtuoso platform. It does not execute any pre-install Virtuoso/PL code from the package, so there is no guarantee that installation will be successful if the check found no error.

Parameters
package_uri – URI of VAD file
See Also

vad_check_uninstallability()

vad_fail_check()

vad_install()

vad_pack()

vad_safe_exec()

vad_uninstall()

vad_load_file()

vad_check()