ERROR MESAGGE:
“Cannot drop full-text catalog ‘catalog_name’ because it contains a full-text index.”
EXPLANATION:
You may receive this error when you try to delete a Full-Text Catalog. This is because, as the message says, this catalog is being used by an Index.
SOLUTION:
Run the following code to determine which table is using the Full-Text Index:
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						SELECT name, ftcatid FROM sysobjects WHERE ftcatid > 0  | 
					
After running this command, tables that use Full-Text will be listed.
Remove the full-text index metadata for the related table with the below script.
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						EXEC sp_fulltext_table 'table_name', 'drop'  | 
					
You can now remove the Full-Text Catalog with the following code:
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						DROP FULLTEXT CATALOG fulltext_catalog_name  |