hello cocoon users, i am trying to solve the following problem:

** problem description *****************************************

a pdf file that is dynamically generated from xml data using the fo2pdf serializer
is downloaded and viewed successfully the first few attempts.


however, after repeated attempts (about a dozen) the pdf file can no longer be viewed by
adobe acrobat which displays the following error messages:


"there was an error processing the page. wrong number of arguments for the setcolor operator"

and

"an unrecognized token 'NaN' was found."


** system configuration ***************************************


the system configuration is as follows:
        cocoon 2.0.4 under jboss 3.2.0 on a linux box with java j2sdk1.4.1_02

the error appears using
        internet explorer
        on a windows xp box
        and adobe acrobat 5.

the error does *not* appear using
        internet explorer
        on os x
        and the os x native pdf viewer.


** debugging **************************************************


i've tried the following to debug/solve the problem:

1. looked at the WEB-INF/logs/error.log and noted the following errors

ERROR (2003-07-10) 15:41.01:031 [core.manager.fop] (/cocoon/mywebapp/report.pdf) PoolThread-2/PageSequence: Page subsequences exhausted. Using previous subsequence.

ERROR (2003-07-10) 15:41.01:032 [core.manager.fop] (/cocoon/mywebapp/report.pdf) PoolThread-2/MessageHandler: Unknown enumerated value for property 'border-bottom-style': black

2. restarted jboss, which eliminated the errors. however, after a dozen or so downloads the error reappears.

3. saved the downloaded report.pdf before and after the error occurs, and the files are different sizes.
also, a diff text viewer indicated that the contents are different. however the os x viewer displays them identically.


4. before sending the fo xml stream to the fo2pdf serializer, i viewed the xml and it is valid, and contained no invalid data
or characters.



** questions ****************************************************


1. does anyone know of any bugs with the fop2pdf serializer (such as memory leaks ) that would corrupt or damage
a pdf file after several download/generation attempts?


2. does anyone know if upgrading to cocoon2.1 would help with this problem?



thanks in advance for any answers!



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