Dear Forum,
Very good day to everyone...
i seek your kind help in assisting the problem.
The conversion from rhomboid pattern to customized pattern which I've created earlier failed.
I actually followed the tutorial video on youtube & when i scroll down the pattern , i am able to see the family which i've created earlier.
However the regenerating failed & I've attached screenshot of the appeared errors.
Deeply appreciate 
Cheers & Thank you.
Is this a Revit API issue, or an end user question?
Are you doing anything programmatically yourself, or just using the standard Revit user interface?
If you are not doing anything programmatically, unfortunately, this is not the best place to ask such a question.
Please note that this discussion forum is dedicated to programming Revit using the Revit API.
Therefore, you cannot expect an answer to a question such as yours relating to installation, product usage or end user support issues here.
You should try one of the non-API Revit product support discussion forums instead for that:
The people there are much better equipped to answer your question than us programming nerds.
If you are doing it programmatically, please be aware that the Revit API hardly ever supports any functionality that is not also available in the user interface.
Therefore, if the UI does not support this, the API will probably not do so either.
So, it will always help to research the optimal manual approach to a solution first, before attacking the task programmatically.
I hope this clarifies.
Thank you for your cooperation and understanding.
Best regards,
Jeremy
