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Exception"x-KSC5601’ is not a supported" while converting PPT to JPG using Aspose.Slides for Java

Hello. I am using Aspose Slides for Java 18.10-jdk16.jar.
There is a problem when I tried to convert ppt file to jpg.
It works fine when I did it in my local server (Tomcat), but library make ArgumentException when I try to convert in development server. This is what exception is.
[19. 1. 17 15:20:35:715 KST] 00000107 SystemOut O 15:20:35.715 [asposeTaskExecutor-1] ERROR s.u.custom.AsposeConversionExecutor [EID:req-c1d0e473-c8e7-457b-b303-a70262561e7e] [SS-ID:tDMaFRo3cgK_d4qy-RbRy_I] [USER-ID:PHK] - class com.aspose.slides.exceptions.ArgumentException: ‘x-KSC5601’ is not a supported encoding
com.aspose.slides.internal.fj.class.int(Unknown Source)
com.aspose.slides.internal.fj.class.long(Unknown Source)
com.aspose.slides.abq.(Unknown Source)
com.aspose.slides.abr.do(Unknown Source)
com.aspose.slides.Presentation.if(Unknown Source)
com.aspose.slides.Presentation.do(Unknown Source)
com.aspose.slides.Presentation.do(Unknown Source)
com.aspose.slides.Presentation.(Unknown Source)
com.aspose.slides.Presentation.(Unknown Source)
smartsuite.upload.custom.AsposeConversionExecutor.executeConversionSlides(AsposeConversionExecutor.java:112)
smartsuite.upload.custom.AsposeConversionTask.run(AsposeConversionTask.java:31)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1156)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:626)
java.lang.Thread.run(Thread.java:780)
at com.aspose.slides.internal.fj.class.int(Unknown Source)
at com.aspose.slides.internal.fj.class.long(Unknown Source)
at com.aspose.slides.abq.(Unknown Source)
at com.aspose.slides.abr.do(Unknown Source)
at com.aspose.slides.Presentation.if(Unknown Source)
at com.aspose.slides.Presentation.do(Unknown Source)
at com.aspose.slides.Presentation.do(Unknown Source)
at com.aspose.slides.Presentation.(Unknown Source)
at com.aspose.slides.Presentation.(Unknown Source)
at smartsuite.upload.custom.AsposeConversionExecutor.executeConversionSlides(AsposeConversionExecutor.java:112)
at smartsuite.upload.custom.AsposeConversionTask.run(AsposeConversionTask.java:31)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1156)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:626)
at java.lang.Thread.run(Thread.java:780)

Is there any solution to fix this?
Development server use Unix, WebSphere 8.5.5.12.

Thanks for any comments.

@hjhwang,

I have observed your comments. Can you please share source files, environment details so that we may further investigate to help you out. Before sharing requested information can you please try to use Aspose.Slides latest version 18.12 on your end and if there is still an issue than please share requested files.