loadrunner回放成功，在场景中就报错

wajudy

loadrunner在回放中正常，在场景中就报错，求高手指教：
Action.c(32): Error -26377: No match found for the requested parameter "session". Check whether the requested boundaries exist in the response data. Also, if the data you want to save exceeds 999999 bytes, use web_set_max_html_param_len to increase the parameter size

Action.c(10): Error -26374: The above "not found" error(s) may be explained by header and body byte counts being 0 and 0, respectively.

Action.c(44): Error -27492: "HttpSendRequest" failed, Windows error code=12002 and retry limit (0) exceeded for URL=