性能测试 -关联 error-26377

做关联，

然后，报这个错o(╥﹏╥)o

Action.c(53): Error -26377: No match found for the requested parameter "sb". Either the specified boundaries were not found in the response or the matched text is longer than current max html parameter size of 256 bytes. The total length of the response is 155033 bytes. You can use "web_set_max_html_param_len" to increase the max parameter size. [MsgId: MERR-26377]

这是为什么，真的要疯！
可以告诉我到底哪些情况下可以做关联吗。
帮我解决一下，十分感谢！