Hi
Manolo,
Thank
you for contacting Syncfusion support.
We
are unable to reproduce the reported exception from our side. So we have
prepared a sample as per your requirement which can be downloaded from the
following link.
Sample
Link:
http://www.syncfusion.com/downloads/support/directtrac/general/ze/XlsIO_Sample1810156344
Kindly
share us the modified issue reproducing sample along with your machine
configuration which will be helpful for us to provide you a prompt solution at
the earliest. In XlsIO, There are few ways to
improve the performance and memory optimization which is explained briefly in
the following UG documentation link.
UG documentation link: http://help.syncfusion.com/file-formats/xlsio/improving-performance
Please
let us know if you need any concerns.
Regards,
Ishwarya
N