java.lang.ClassCastException: java.lang.Double cannot be cast to java.lang.Boolean

[sabomichal]

I am getting this class cast error when rendering some pdf documents (do not happen for all of them)

java.lang.ClassCastException: java.lang.Double cannot be cast to java.lang.Boolean
at com.sun.pdfview.function.postscript.operation.If.eval(Unknown Source)
at com.sun.pdfview.function.FunctionType4.doFunction(Unknown Source)
at com.sun.pdfview.function.PDFFunction.calculate(Unknown Source)
at com.sun.pdfview.function.PDFFunction.calculate(Unknown Source)
at com.sun.pdfview.colorspace.AlternateColorSpace.getPaint(Unknown Source)
at com.sun.pdfview.PDFParser.iterate(Unknown Source)
at com.sun.pdfview.BaseWatchable.run(Unknown Source)
at java.lang.Thread.run(Thread.java:662)