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POAbcpdf throwing System.ExecutionEngineException
 

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    <p>I have the binary for several pdf files stored in a collection of Byte arrays.</p> <p>My goal is to concatenate them into a single .pdf file using abcpdf, then stream that newly created file to the Response object on a page of an ASP.Net website.</p> <p>Had been doing it like this:</p> <p>BEGIN LOOP ...</p> <pre><code>'Create a new Doc Dim doc As Doc = New Doc 'Read the binary of the current PDF doc.Read(bytes) 'Append to the master merged PDF doc _mergedPDFDoc.Append(Doc) </code></pre> <p>END LOOP</p> <p>Which was working fine 95% of the time. Every now and then however, creating a new Doc object would throw a System.ExecutionEngineException and crash the CLR. It didn't seem to be related to a large number of pdfs (sometimes would happen w/ only 2), or with large sized pdfs. It seemed almost completely random.</p> <p>This is a known bug in abcpdf described (not very well) here <a href="http://www.websupergoo.com/support.htm" rel="nofollow noreferrer">Item 6.24</a>. I came across <a href="https://stackoverflow.com/questions/176113/every-now-and-then-abcpdf-runs-out-of-memory/176143#176143">a helpful SO post</a> which suggested using a Using block for the abcpdf Doc object.</p> <p>So now I'm doing this:</p> <pre><code> Using doc As New Doc 'Read the binary of the current PDF doc.Read(bytes) 'Append to the master merged PDF doc _mergedPDFDoc.Append(doc) End Using </code></pre> <p>And I haven't seen the problem occur again yet, and have been pounding on a test version as best as I can to get it to.</p> <p>Has anyone had any similar experience with this error? Did this fix it?</p>
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    1. COFWIW I don't know how to fix this bug or if `using` will continue to stop it but I use the iTextSharp PDF library for pretty much the same thing and don't have any problems (and I'm adding 100s of docs together)
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