含末尾单引号的IFC文件在Autodesk Forge转换失败的原因问询

• 使用的API：POST /modelderivative/v2/designdata/job
• 目标属性值：EL-G35211AN/6-SP/L''

IFC文件中包含目标属性值的行数据： #

#2340 = IFCFLOWTERMINAL('32hCanqHP0QAQmHARnRsKT', #2341, '\X2\30107167660E56685177FF0830E630FC30B630FC90E86750FF093011FF7CFF7DFF83FF9159294E95FF086D45578BFF09\X0\ EL-G35211AN/6-SP/L'', '\X2\6A5F566830FB56685177\X0\. \X2\30E630FC30B630FC90E86750\X0\', $, #2353, #2339, $);

#2346 = IFCLIGHTFIXTURETYPE('2A0TvRw8rCk8EKh4gObqVr', #2341, '\X2\30107167660E56685177FF0830E630FC30B630FC90E86750FF093011FF7CFF7DFF83FF9159294E95FF086D45578BFF09\X0\ EL-G35211AN/6-SP/L'', '\X2\6A5F566830FB56685177\X0\. \X2\30E630FC30B630FC90E86750\X0\', $, $, $, $, $, .NOTDEFINED.);#2390 = IFCPROPERTYSINGLEVALUE('\X2\540D79F0\X0\', '', IFCTEXT('\X2\FF7CFF7DFF83FF9159294E95FF086D45578BFF09\X0\ EL-G35211AN/6-SP/L''), $);

#2378 = IFCPROPERTYLISTVALUE('table_data', '', (IFCTEXT('SPVER,10,\X2\4ED569D866F830D030FC30B830E730F330B330FC30C9\X0\,'), IFCTEXT('CGRYCODE,403000000000000000,\X2\6A5F56685206985E30B330FC30C9\X0\,,'), IFCTEXT('NAME2,\X2\FF7CFF7DFF83FF9159294E95FF086D45578BFF09\X0\,\X2\578B5F0F540D79F0\X0\,'), IFCTEXT('NAME1,EL-G35211AN/6-SP/L'',\X2\30E130FC30AB30FC578B756A\X0\,')), $);

#2390 = IFCPROPERTYSINGLEVALUE('\X2\540D79F0\X0\', '', IFCTEXT('\X2\FF7CFF7DFF83FF9159294E95FF086D45578BFF09\X0\ EL-G35211AN/6-SP/L''), $);
#2398 = IFCPROPERTYSINGLEVALUE('\X2\578B756A\X0\', '', IFCTEXT('EL-G35211AN/6-SP/L''), $);

转换返回的manifest错误信息： #

{
    "urn": "XXXXXXXXXX",
    "derivatives": [
        {
            "hasThumbnail": "false",
            "name": "XXXXXXXX.ifc",
            "progress": "complete",
            "messages": [
                {
                    "type": "error",
                    "code": "Navisworks-Internal",
                    "message": "Error code: 2 - bec9343c395241f266d3b7af86dee70e041d7687d3b4f0f0c0952b04ff3c39eb.ifc could not be opened because the contents are corrupt or it is currently unavailable.\n\nIt is recommended to re-open your model to avoid data loss.\n"
                },
                {
                    "type": "error",
                    "message": "Unrecoverable exit code from extractor: -1073741829",
                    "code": "TranslationWorker-InternalFailure"
                }
            ],
            "outputType": "svf2",
            "status": "failed"
        }
    ],
    "hasThumbnail": "false",
    "progress": "complete",
    "type": "manifest",
    "region": "US",
    "version": "1.0",
    "status": "failed"
}

问题根源是IFC文件中属性值末尾的单引号未遵循正确的转义规则，导致语法解析错误：

1. IFC语法明确规定，字符串中的单引号必须用两个连续单引号表示一个实际的单引号。但你提供的IFC行数据中，比如IFCTEXT('EL-G35211AN/6-SP/L'')，末尾的两个单引号会被解析器误判为：一个转义后的单引号（即实际输出一个'）加上一个多余的、未闭合的单引号，直接破坏了IFC实体的语法结构。

2. Model Derivative服务底层依赖Navisworks解析IFC文件，当解析器遇到这种语法错误时，会认为文件内容损坏，抛出"无法打开文件"的错误。

3. 错误代码-1073741829对应Windows系统的STATUS_ACCESS_VIOLATION，说明解析器在处理错误语法时触发了内存访问异常，直接导致转换进程崩溃。

内容的提问来源于stack exchange，提问作者Akitoshi.M