Topic:
Error Message:  Horizon must have time attribute values.

Description:
A Computed Seismic Attributes (CSA) operation is selected and a horizon
chosen from the parameters window, after clicking the start button a dialog
box appears with the message: Horizon must have time attribute values.       

Solution:
The horizon that has been selected does not have a time attribute stored
under the name of Z. It must be stored under the attribute name of Z in 
order to be used by Computation Manager.

If you have a time attribute that is not named 'Z', you can change the attribute
name to Z in Data Manager > Surface. Select the correct domain, survey, surface
and select transfer mode to 'Horizon attribute => Surface grid'. Select the time
attribute and input a grid name. Select 'Add to Transfer list', then select
'Transfer'. After transfer has completed, select the transfer mode to 'Surface
grid => Horizon attribute, input Z for attribute name and select the new grid,
select 'Add to Transfer list' then select 'Transfer'. Now you will have a
Z(time) attribute to run CSA operations. 



Last Modified on: 09-JUN-00