how can I avoid Textmerge is recursive error?

my code:

	TEXT TO dlcSQL TEXTMERGE noshow
		SELECT nStdPrice,nstdxprice
			FROM `StockDetail` 
		where cStdCode = '<<cIvdCode>>'
	ENDTEXT

I added

       dlcSQL=''
	TEXT TO dlcSQL TEXTMERGE noshow
		SELECT nStdPrice,nstdxprice
			FROM `StockDetail` 
		where cStdCode = '<<cIvdCode>>'
	ENDTEXT

sometimes it works sometimes not.

please advise

Regards,

Jerry