请问一下MutiUpload后台如何返回才会显示成功

mp7300s

文件成功上传但是在前台里面一直显示"上传失败"，文件也确实保存到指定位置

代码:
<div id="budgetUpload" class="uc-multiupload"
                                                        style="overflow: inherit;"
                                                        flashurl="${ctx}/js/scripts/thirdparty/swfupload/swfupload.swf"
                                                        uploadurl="${ctx}/project/upload/budgetUpload?idx=${id}"
                                                        _autoUpload="false">
                                                </div>



console错误:

apply?id=2:340 Uncaught ReferenceError: file is not defined    at UserControl.MultiUpload.onUploadError (apply?id=2:340)    at UserControl.MultiUpload.OOOO [as fire] (miniui.js:11)    at UserControl.MultiUpload.__on_upload_error (multiupload.js:258)    at SWFUpload.<anonymous> (miniui.js:11)    at SWFUpload.<anonymous> (swfupload.js:740)    at SWFUpload.executeNextEvent (swfupload.js:760)    at swfupload.js:745

	onUploadError	@	apply?id=2:340
	OOOO	@	miniui.js:11
	__on_upload_error	@	multiupload.js:258
	(anonymous)	@	miniui.js:11
	(anonymous)	@	swfupload.js:740
	SWFUpload.executeNextEvent	@	swfupload.js:760
	(anonymous)	@	swfupload.js:745
	setTimeout (async)
	SWFUpload.queueEvent	@	swfupload.js:744
	SWFUpload.uploadError	@	swfupload.js:909
	(anonymous)	@	VM739:1

felt

参考mutilupload.js
如果上传成功，是进__on_upload_success这个方法，这个方法更新status字段1，肯定是上传成功啊。