shape issue in load_workbook
*Created originally on Bitbucket by [JeremKoneo (Jeremie Magnette)](https://bitbucket.org/%7Bd56f8d8b-87c3-430f-95f8-9e1a60565dcf%7D/)*
Hello,
as asked in [#971](https://bitbucket.org/openpyxl/openpyxl/issues/971/error-when-loading-xlsm-load_workbook#comment-48186930), I'm creating a new issue for my problem.
I encounter an exception when loading one of my excel files (very simple example attached).
It seems to be ML_Drawing related. I'm using openpyxl 2.5.8.
If I remove the shapes/arrows, then the issue disappear.
I've seen that this issue comes a lot here (mainly because ML_Drawing API is not open ?).
Do you think that it would be feasible to not crash but better add a "warning/error" mechanism, that could be enabled, allowing users to still read problematic files ?
This system would still allow users to give you feedback on what is missing, while still being capable to use the 2.5.x openpyxl version.
Right now, because I cannot delete those shapes (Client's file), I will downgrade to 2.4.x version of openpyxl.
*Attachments:* [shape_error.xlsx](/uploads/a3283ddc60b831811b6afad0cf7c6592/shape_error.xlsx)
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