Mathew:

I'm trying to build a PostScript to PDF Converter using Ghostscript.Net. The Args that GetArgs return, are the ones I usually use to call gswin32c.exe and they work fine.

But every time i call Process, i get an error Saying "An error occured when call to 'gsapi_init_with_args' is made: -100". Googling that error didn't bring anything up so I thought I might ask here.

Are there differnet arguments to consider when calling the .dll directly with Ghostscript.net? Or did I made a mistake somewhere else?

Here's my class:

public class PdfConverter
{
    #region Private Fields
    private List _Versions = GhostscriptVersionInfo.GetInstalledVersions(GhostscriptLicense.GPL | GhostscriptLicense.AFPL | GhostscriptLicense.Artifex);
    #endregion


    #region Private Properties
    private GhostscriptVersionInfo Version { get; set; }
    #endregion


    #region Construction
    public PdfConverter()
    {
        Version = GhostscriptVersionInfo.GetLastInstalledVersion(); 
    }
    #endregion


    #region Public Members
    public bool ConvertToPdf(DirectoryInfo dir)
    {
        var d = dir;
        if(!d.Exists)
            return false;

        var postScriptFiles = d.GetFiles("*.ps");
        var pdfFiles        = postScriptFiles.Select(psf => new FileInfo(Path.ChangeExtension(psf.FullName, ".pdf")));

        foreach(var file in postScriptFiles) {
            //ThreadPool.QueueUserWorkItem(new WaitCallback((o) => { 
                Process(file, new FileInfo(Path.ChangeExtension(file.FullName, ".pdf")));
            //}));
        }

        pdfFiles.ForEach(pdf => pdf?.Refresh());
        return pdfFiles.All(pdf => pdf.Exists);
    }
    #endregion


    #region Private Helpers
    private void Process(FileInfo inputFile, FileInfo outputFile)
    {
        Console.WriteLine($"Converting {inputFile} to {outputFile}");
        var proc = new GhostscriptProcessor(Version, true);
        proc.Process(GetArgs(inputFile, outputFile).ToArray(), new ConsoleStdIO(true, true, true));
    }


    private IEnumerable GetArgs(FileInfo inputFile, FileInfo outputFile)
    {
        return new [] {
            $"-q ",
            $"-sDEVICE=pdfwrite",
            $"-dSAFER",
            $"-dNOPAUSE",
            $"-dBATCH",
            $"-sPAPERSIZE=a4",
            $"-dEmbedAllFonts=true",
            $"-dAutoRotatePages=/None",
            $"-sOutputFile=\"{outputFile.FullName}\"",
            $"-dCompatibilityLevel#1.4",
            $"-c .setpdfwrite",
            $"-f \"{inputFile.FullName}\""
        };
    }
    #endregion
}

Happy Hacking Mathew