拉力赛Excel加载项

我正在尝试运行在拉力赛加载中的Excel查询,但得到一个模棱两可的错误,不知道如何解决,你能协助吗? 这是查询:

((((State != Closed) AND (CreationDate <= 2015-02-10)) AND ((Severity = Crash/Data Loss) OR (Severity = Major Problem))) AND (Iteration != Iteration 34)) 

错误是:

无法parsing:parsingexpression式的错误 – 预期的“)”,但看到“损失”,而不是。

正如你在评论中证实的,你只需要一些引号,即

 ((((State != Closed) AND (CreationDate <= 2015-02-10)) AND ((Severity = "Crash/Data Loss") OR (Severity = "Major Problem"))) AND (Iteration != "Iteration 34"))