asammdf 的错误："error: unpack requires a buffer of 56 bytes"

Question

我正在使用asammdf软件包来加载MDF文件。 下面的代码仅适用于我的一些 MDF 文件。 许多文件给我以下错误。 我能够在CANape中打开文件，没有问题。

在桌面应用程序中加载文件(这有效(

from asammdf import MDF
mdf = MDF(r'\Stnafddco123.us123.corpintra.netveh_testVehicles_Data_and_Truck_InfoAPTIV_logger_data1FUJHLDR8KLXXXXXX_Trip-Detail_2019-07-16 15-18-25.mf4')
mdf

---

error                                     Traceback (most recent call last)
<ipython-input-16-c9001bcab2a9> in <module>()
1 from asammdf import MDF
----> 2 mdf = MDF(r'\Stnafddco123.us123.corpintra.netveh_testVehicles_Data_and_Truck_InfoAPTIV_logger_data1FUJHLDR8KLXXXXXX_Trip-Detail_2019-07-16 15-18-25.mf4')
3 mdf
~AppDataLocalContinuumanaconda3libsite-packagesasammdfmdf.py in __init__(self, name, version, **kwargs)
124                 self._mdf = MDF3(name, **kwargs)
125             elif version in MDF4_VERSIONS:
--> 126                 self._mdf = MDF4(name, **kwargs)
127             elif version in MDF2_VERSIONS:
128                 self._mdf = MDF2(name, **kwargs)
~AppDataLocalContinuumanaconda3libsite-packagesasammdfblocksmdf_v4.py in __init__(self, name, version, **kwargs)
247                     self._file = mmap.mmap(x.fileno(), 0, access=mmap.ACCESS_READ)
248                     self._from_filelike = False
--> 249                     self._read(mapped=True)
250 
251                     self._file.close()
~AppDataLocalContinuumanaconda3libsite-packagesasammdfblocksmdf_v4.py in _read(self, mapped)
415                 # Read channels by walking recursively in the channel group
416                 # starting from the first channel
--> 417                 self._read_channels(ch_addr, grp, stream, dg_cntr, ch_cntr, mapped=mapped)
418 
419                 cg_addr = channel_group.next_cg_addr
~AppDataLocalContinuumanaconda3libsite-packagesasammdfblocksmdf_v4.py in _read_channels(self, ch_addr, grp, stream, dg_cntr, ch_cntr, channel_composition, mapped)
760                 at_map=self._attachments_map,
761                 use_display_names=self._use_display_names,
--> 762                 mapped=mapped,
763             )
764 
~AppDataLocalContinuumanaconda3libsite-packagesasammdfblocksv4_blocks.py in __init__(self, **kwargs)
606                         conv = ChannelConversion(
607                             raw_bytes=raw_bytes, stream=stream, address=address,
--> 608                             mapped=mapped,
609                         )
610                         cc_map[raw_bytes] = conv
~AppDataLocalContinuumanaconda3libsite-packagesasammdfblocksv4_blocks.py in __init__(self, **kwargs)
2010                     self.min_phy_value,
2011                     self.max_phy_value,
-> 2012                 ) = v4c.CONVERSION_NONE_INIT_u(block)
2013 
2014             elif conv == v4c.CONVERSION_TYPE_LIN:
error: unpack requires a buffer of 56 bytes

Answer 1

使用 MDFValidator 打开文件时是否看到任何错误？