Symptoms: The "Specified Cast Is Not Valid" exception fires.
Cause: There is a mix of old and new dlls in the references.
Solution:
- Remove all ActiveReports for .NET 3.0 references from the project.
- Add the ActiveReports for .NET 3.0 references necessary to your project, making sure to use only references to assemblies from the latest build installed on your machine.
Symptoms: Reports exported to TIFF format with the RLE or CCITT3 compression scheme are rendering black.
Cause: The sections in the reports have a BackColor and are not being dithered.
Solution: Set the Dither property for the export object to True, or set the BackColor property of each section to Transparent.
Symptoms: Some reports are exported to TIFF with extra white space at the bottom of the page.
Cause: The default value for CompressionScheme is CCITT3. According to CCITT3 standards, the page size is 1728 x 2376 pixels and the resolution is 200 x 196 DPI, as required by some fax machines. If the page is smaller than this standard, then it is scaled up to CCITT3 standards, which can cause extra white space at the bottom.
Solution: To get an accurate page size set the CompressionScheme to CompressionScheme.Rle (Run length encoding).