LoadRunner Error -26366: "Text=checkString" not found for web_reg_find 报错

在学习LoadRunner添加检查点函数时，遇到下面的报错

Action.c(135): Error -26366: "Text=checkString" not found for web_reg_find  	[MsgId: MERR-26366]
Action.c(135): web_concurrent_end highest severity level was "ERROR", 2354 body bytes, 478 header bytes  	[MsgId: MMSG-26388]

出现缘由是检查点函数位置写的不对。在LoadRunner中，含有reg的函数能够称为注册函数，这种类型函数的特色是在使用时，要放在实际请求提交以前。
初始录制脚本为：

web_submit_data("login.pl", 
		"Action=http://127.0.0.1:1080/WebTours/login.pl", 
		"Method=POST", 
		"RecContentType=text/html", 
		"Referer=http://127.0.0.1:1080/WebTours/nav.pl?in=home", 
		"Snapshot=t9.inf", 
		"Mode=HTTP", 
		ITEMDATA, 
		"Name=userSession", "Value=126807.596597813zfcczzfpHfDQVDfpQQtf", ENDITEM, 
		"Name=username", "Value=test1", ENDITEM, 
		"Name=password", "Value=111111", ENDITEM, 
		"Name=JSFormSubmit", "Value=off", ENDITEM, 
		"Name=login.x", "Value=36", ENDITEM, 
		"Name=login.y", "Value=5", ENDITEM, 
		LAST);

	web_url("login.pl_2", 
		"URL=http://127.0.0.1:1080/WebTours/login.pl?intro=true", 
		"Resource=0", 
		"RecContentType=text/html", 
		"Referer=http://127.0.0.1:1080/WebTours/login.pl", 
		"Snapshot=t15.inf", 
		"Mode=HTTP", 
		LAST);

	web_reg_find("Text=test1",LAST);

此时，由于检查点函数放在请求提交以后，因此回放时出现上面提到的报错。修改脚本以下：

web_reg_find("Text=test1",LAST);

	web_submit_data("login.pl", 
		"Action=http://127.0.0.1:1080/WebTours/login.pl", 
		"Method=POST", 
		"RecContentType=text/html", 
		"Referer=http://127.0.0.1:1080/WebTours/nav.pl?in=home", 
		"Snapshot=t9.inf", 
		"Mode=HTTP", 
		ITEMDATA, 
		"Name=userSession", "Value=126807.596597813zfcczzfpHfDQVDfpQQtf", ENDITEM, 
		"Name=username", "Value=test1", ENDITEM, 
		"Name=password", "Value=111111", ENDITEM, 
		"Name=JSFormSubmit", "Value=off", ENDITEM, 
		"Name=login.x", "Value=36", ENDITEM, 
		"Name=login.y", "Value=5", ENDITEM, 
		LAST);

	web_url("login.pl_2", 
		"URL=http://127.0.0.1:1080/WebTours/login.pl?intro=true", 
		"Resource=0", 
		"RecContentType=text/html", 
		"Referer=http://127.0.0.1:1080/WebTours/login.pl", 
		"Snapshot=t15.inf", 
		"Mode=HTTP", 
		LAST);

运行修改后的脚本，显示成功信息。

Action.c(95): Registering web_reg_find was successful  	[MsgId: MMSG-26390]