openmeetings error

I try to integrate openmeetings (web-conference software) into my facebook, but there is an error on server. it seems an error on file uploading, previously i upload my ppt to test the presentation, the slide was uploaded but i can't start to make slide-show.

Name: exitValue
Value: 139
Name: command
Value: [java, -cp, "/home/swagner/recording4/red5/webapps/openmeetings/jod/commons-cli-1.2.jar" -cp "/home/swagner/recording4/red5/webapps/openmeetings/jod/commons-io-1.4.jar" -cp "/home/swagner/recording4/red5/webapps/openmeetings/jod/jodconverter-2.2.2.jar" -cp "/home/swagner/recording4/red5/webapps/openmeetings/jod/jodconverter-cli-2.2.2.jar" -cp "/home/swagner/recording4/red5/webapps/openmeetings/jod/juh-3.0.1.jar" -cp "/home/swagner/recording4/red5/webapps/openmeetings/jod/jurt-3.0.1.jar" -cp "/home/swagner/recording4/red5/webapps/openmeetings/jod/ridl-3.0.1.jar" -cp "/home/swagner/recording4/red5/webapps/openmeetings/jod/slf4j-api-1.5.6.jar" -cp "/home/swagner/recording4/red5/webapps/openmeetings/jod/slf4j-jdk14-1.5.6.jar" -cp "/home/swagner/recording4/red5/webapps/openmeetings/jod/unoil-3.0.1.jar" -cp "/home/swagner/recording4/red5/webapps/openmeetings/jod/xstream-1.3.1.jar", -jar, /home/swagner/recording4/red5/webapps/openmeetings/jod/jodconverter-cli-2.2.2.jar, /home/swagner/recording4/red5/webapps/openmeetings/uploadtemp/files/ada0143ad9a13712c94cc199d9764fd2.ppt, /home/swagner/recording4/red5/webapps/openmeetings/upload/files/ada0143ad9a13712c94cc199d9764fd2/ada0143ad9a13712c94cc199d9764fd2.pdf]
Name: error
Value: 
Name: process
Value: doJodConvert
Name: exitValue
Value: 0
Name: process
Value: generateXMLDocument
Name: exitValue
Value: 1
Name: command
Value: [convert, -thumbnail, 80, /home/swagner/recording4/red5/webapps/openmeetings/upload/files/ada0143ad9a13712c94cc199d9764fd2/ada0143ad9a13712c94cc199d9764fd2.pdf, /home/swagner/recording4/red5/webapps/openmeetings/upload/files/ada0143ad9a13712c94cc199d9764fd2/_thumb_page-%04d.jpg]
Name: error
Value: convert: unable to open image `/home/swagner/recording4/red5/webapps/openmeetings/upload/files/ada0143ad9a13712c94cc199d9764fd2/ada0143ad9a13712c94cc199d9764fd2.pdf': No such file or directory.convert: missing an image filename `/home/swagner/recording4/red5/webapps/openmeetings/upload/files/ada0143ad9a13712c94cc199d9764fd2/_thumb_page-%04d.jpg'.
Name: process
Value: generateBatchThumbByWidth
Name: exitValue
Value: 0
Name: process
Value: processPDF
Name: exitValue
Value: 1
Name: command
Value: [pdf2swf, -s, insertstop, /home/swagner/recording4/red5/webapps/openmeetings/upload/files/ada0143ad9a13712c94cc199d9764fd2/ada0143ad9a13712c94cc199d9764fd2.pdf, /home/swagner/recording4/red5/webapps/openmeetings/upload/files/ada0143ad9a13712c94cc199d9764fd2/ada0143ad9a13712c94cc199d9764fd2.swf]
Name: error
Value: Error: Couldn't open file '/home/swagner/recording4/red5/webapps/openmeetings/upload/files/ada0143ad9a13712c94cc199d9764fd2/ada0143ad9a13712c94cc199d9764fd2.pdf'
Name: process
Value: generateSwf

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