Hi cb,
Thank you for your interest in Syncfusion products.
I am afraid that I was not able to reproduce the issue when we adding long text inside the PDF table error will be thrown.
Here is the Sample that we have used to test this issue.
http://websamples.syncfusion.com/samples/PDF.Windows/F68277/main.htmCan you please take a look into this sample and modify the sample or provide your sample with more details. So that we would be able to reproduce the issue and investigate more on this issue.
Best Regards,
Bhuvana