SO0 is the set up table for Sales Order module, in your case, for company code AMT.
What I recomend, assuming you don't have a backup, is create a new company, activate sales order, and take it's SO0 file and put it in place of the old one. Then, you enter setup for Sales order, and fix it to the correct setup.
If you create a new company, say code xxx, then it will create the S00XXX.SOA file. You will have to copy it to the correct location and rename it.
ChaZ
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