SelectPdf HtmlToImage throwing "Conversion error: Unknown error"

Question

I am using SelectPDF to generate pdfs from a cshtml template. My PDF generates locally, but when on production I get an error.

Stack trace: at SelectPdf.HtmlToImage.?(String A_0, String A_1, String A_2, ?[]& A_3, ?& A_4)\r\n at SelectPdf.HtmlToPdf.?(String A_0, String A_1, String A_2, String A_3, Boolean A_4)\r\n at SelectPdf.HtmlToPdf.ConvertHtmlString(String htmlString)\r\n at Test.GenerateSelectPDF(ReportObj report)\r\n at Test.ReportsController.d__6.MoveNext()

I've ensured that the dll, Select.Pdf.dll and Select.Html.dep are in my bin folder along with Select.Pdf.xml and Select.Tools.dep.

Since I can generate the same report locally I think this is a configuration issue.

The version of SelectPDF is v17.3.0, using .net 4 assemblies — NetHawk, Feb 27 '18 at 19:47
I have changed my template files to generate a single div with the word 'test', so I am now sure that the html being generated is not the problem. — NetHawk, Feb 27 '18 at 20:32
did you ever find a solution to this? I'm getting a very similar error, but it's intermittent and driving me insane. Thanks! — Ted Krapf, May 21 '18 at 17:11
I'm getting this exact problem as well, did you ever find a solution? — CopyPasteGhost, Apr 02 '20 at 13:24
I never did find a solution and started using wkhtmltopdf instead. — NetHawk, Jun 25 '20 at 11:34
I got same issue when I added WebPageFixedSize but started working again when I removed it — Steve, Dec 12 '22 at 20:08

Aravindakumar S · Answer 1 · 2022-09-09T07:21:42.413

1

Check the execution by increasing the MaxPageLoadTime property of the converter (HTMLToPDF object)

By default, the value is 60 seconds

Example:

converter.Options.MaxPageLoadTime = 240;

Reference: Link

edited Sep 09 '22 at 07:21

answered Aug 18 '22 at 09:02

Aravindakumar S

21
5

score 0 · Answer 2 · answered May 06 '23 at 22:32

I've experienced a similar issue: System.Exception: Conversion failure error 5.

Regarding the documentation - Select.Html.dep missed execute permissions. I've added execute permissions for IIS AppPool\DefaultAppPool (change user if your app is not running under default pool) and that resolved the problem.

SelectPdf HtmlToImage throwing "Conversion error: Unknown error"

2 Answers2