Note for FLUENT 12 Users:

For Fluent12, Ansys have modified and incorporated the "tee.scm" file within Fluent 12 itself.

As a result, if you are using Fluent 12, and would like to export existing transient results to EnSight:
a. Do not use the external tee.scm file for Fluent 6.3
b. Within Fluent 12 directly, users should access TUI command line : 'file àransient-export ànsight-gold-from-existing-files'