Unable to retrieve Guid with replace Tokens

Environment :

- DS6.9 SP6

- SMP 7.5 SP1

I need to retrieve the Guid from the computer in Symantec_CMDB from a DS job. For this I've used a "replace tokens" instruction with this query :

%#SMP*"SELECT vc.Guid FROM Inv_HW_Chassis ihwc inner join vComputer vc on ihwc._ResourceGuid = vc.Guid where ihwc.

[Serial Number] = '%SERIALNUM%'"%

The result is...blanck (SMP is a custom DataSource declared in DS option). If I replace the "Select vc.Guid" by "Select vc.name" it works perfectly and return the Computername : for me, it's not a problem in the Datasource declaration, neither a syntax error in SQL Statement !?

Can anybody reproduct this tip...and have an idea ?

David