The current implementation expects the widths to be integer values and InvalidCastException is thrown when a real number is parsed.

Workaround: If the scenario allows, the PdfStreamWriter may be used instead of PdfFormatProvider. More information may be found in the following documentation article:
http://docs.telerik.com/devtools/document-processing/libraries/radpdfprocessing/formats-and-conversion/pdf/pdfstreamwriter/overview

Available in LIB Version 2017.2.731.