libmysequoia and INNER JOIN

hi list,

i have the following error when i try to generate an xls file from my php web application

SQL ERROR: Invalid SQL: SELECT merchant.*, countries.Country FROM merchant INNER JOIN countries ON merchant.IdCountry=countries.IdCountry WHERE Idmerchant=678
MySQL Error: 2000 (Unexpected CarobException: Unsupported deserialization of java objects)
Session halted.

this error is reported by php ... 
on libmysequoa side i have nothing in log file
-------- /etc/mysequoia/logger.conf -----------
log4j.rootLogger=debug, file
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=/var/log/mysequoia.log
log4j.appender.file.MaxFileSize=10MB
log4j.appender.file.MaxBackupIndex=3
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d %p %t %c (%F:%L) - %m%n
# Print only messages of level ERROR or above in the namespace MySQLAPI.
log4j.logger.LibMySequoia=ERROR
---------- end ------------------------------


i have php 4.4.6 ... apache 1.3.37 started with
MYLIBS="/usr/lib/mysequoia/libmysequoia.so:/usr/lib/libcarob.so:/usr/lib/php/extensions/mysql.so:/usr/libexec/apache/libphp4.so"
HTTPD="env LD_PRELOAD=$MYLIBS /usr/sbin/httpd"
and sequoia 2.10.6 with two mysql 4.1.22 backend and mysql jdbc 5.0.5

what is the meening of that error "Unsupported deserialization of java objects" ?

Regards,
Mihai



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