Got "XForm object must represent pdf stream" error while parsing specific pdf files using Aspose.PDF.Net v22.6.0

Aspose.PDF Product Family
1

Got “XForm object must represent pdf stream” errFamz.pdf (235.3 KB)
while parsing attached pdf files.
It only failed on attached files.

version: Aspose.PDF.22.6 for .Net/C#

error message:
System.ArgumentException: XForm object must represent pdf stream.
at Aspose.Pdf.XForm…ctor(#=zBHbPhCWM5m5_rquUytI0YYDwLzd5b8ZiEA== #=z4u8Mi$w7_eZV, Boolean #=z2F24KLM=)
at Aspose.Pdf.XForm…ctor(#=zBHbPhCWM5m5_rquUytI0YYDwLzd5b8ZiEA== #=z4u8Mi$w7_eZV)
at Aspose.Pdf.Annotations.AppearanceDictionary.#=z5$K2zVs=(String #=zsIrBRts=)
at Aspose.Pdf.Annotations.AppearanceDictionary.get_Item(String key)
at Aspose.Pdf.Facades.Form.#=zfMHMzgVBSFG2(WidgetAnnotation #=zaYKpRV8=)
at Aspose.Pdf.Facades.Form.#=zgU_7hrk=(WidgetAnnotation #=zaYKpRV8=)
at Laserfiche.BPMServer.Tests.DocumentServices.Pdf.AsposePdfDebug.Debug(String filePath, String fileName)

sample code to reproduce:
var path = Path.Combine(filePath, fileName);
// Create Form Object
var form = new Aspose.Pdf.Facades.Form();
// Open Document
form.BindPdf(path);
foreach (var fieldName in form.FieldNames.ToList())
{
var type = form.GetFieldType(fieldName);
var facade = form.GetFieldFacade(fieldName);
var value = form.GetField(fieldName);

    Console.WriteLine(type);
    Console.WriteLine(facade.Caption);
    Console.WriteLine(value);
}
2

@gf4t47

We have logged this problem in our issue tracking system as PDFNET-52094. You will be notified via this forum thread once this issue is resolved.

We apologize for your inconvenience.

3

It would be a different error message if switch the sample code order
var type = form.GetFieldType(fieldName);
var facade = form.GetFieldFacade(fieldName);
=>
var facade = form.GetFieldFacade(fieldName);
var type = form.GetFieldType(fieldName);

System.InvalidCastException: Unable to cast object of type ‘#=z7usxSOiZOgmwJ1s6llAcNBNksNXspZJVCQ==’ to type ‘#=zmyKBWDM0wMjrmYB_5UCLrqxlGC44mhZKtg==’.
at #=zZ6lUGLojU6wvByyTys0oP_3swhQa0nMoTkm1NOTxiIhPEFAEdQ==.#=zYqLvF9s=()
at Aspose.Pdf.Operators.SelectFont.#=zJdpj$Vs=(#=zH7ccyGbxhZj8jJl9LKSppqcA6hnPMuQ5RwhKY$h8RqVe #=zsNMNVmI=)
at Aspose.Pdf.Operator…ctor(Int32 #=zGgjhL5M=, #=zH7ccyGbxhZj8jJl9LKSppqcA6hnPMuQ5RwhKY$h8RqVe #=zsNMNVmI=)
at Aspose.Pdf.Operators.TextOperator…ctor(Int32 #=zGgjhL5M=, #=zH7ccyGbxhZj8jJl9LKSppqcA6hnPMuQ5RwhKY$h8RqVe #=zsNMNVmI=)
at Aspose.Pdf.Operators.TextStateOperator…ctor(Int32 #=zGgjhL5M=, #=zH7ccyGbxhZj8jJl9LKSppqcA6hnPMuQ5RwhKY$h8RqVe #=zsNMNVmI=)
at Aspose.Pdf.Operators.SelectFont…ctor(Int32 #=zGgjhL5M=, #=zH7ccyGbxhZj8jJl9LKSppqcA6hnPMuQ5RwhKY$h8RqVe #=zsNMNVmI=)
at #=zZ6lUGLojU6wvByyTys0oP_3swhQa0nMoTkm1NOTxiIhPEFAEdQ==.#=zJjdztSM=(Int32 #=zGgjhL5M=)
at Aspose.Pdf.Operator.#=zkDHJnKU=(Int32 #=zGgjhL5M=, #=zH7ccyGbxhZj8jJl9LKSppqcA6hnPMuQ5RwhKY$h8RqVe #=zsNMNVmI=)
at Aspose.Pdf.Annotations.DefaultAppearance.#=z9dHfHP4=(#=zPG$JvF_hMEVmEDdLmIWeznCHLAmZXjJ7dQ== #=zj0qfgxL99OnGykRZKg==)
at Aspose.Pdf.Annotations.DefaultAppearance…ctor(#=zPG$JvF_hMEVmEDdLmIWeznCHLAmZXjJ7dQ== #=zj0qfgxL99OnGykRZKg==)
at Aspose.Pdf.Annotations.WidgetAnnotation.get_DefaultAppearance()
at Aspose.Pdf.Facades.Form.GetFieldFacade(String fieldName)

Also under Aspose.PDF v19.2, the same code/file cause a null reference error
System.NullReferenceException: Object reference not set to an instance of an object.
at Aspose.Pdf.Facades.Form.#=zJJUbGMM4rmLF(WidgetAnnotation #=zhE5o5Lw=)
at Aspose.Pdf.Facades.Form.#=zOccM2mo=(WidgetAnnotation #=zhE5o5Lw=)

Hope those information would help.

4

@gf4t47

We have logged this detail in our issue tracking system. We will inform you once there is an update available on this issue.

5

The issues you have found earlier (filed as PDFNET-52094) have been fixed in Aspose.PDF for .NET 23.5.

6

Hello Aspose,

I have the same problem with the Java variant. Is it fixed for Java too?
Thank you and best regards

Otto

7

@otto.eisenschmid

Yes, every fix is ported into equivalent version of Aspose.PDF for Java. You can please try using it and let us know if issue still persists.