Java 7 Update 11 and Update 13 - invalid CEN header (bad signature) error

Discussion created by itraining on Feb 13, 2013
Latest reply on Feb 15, 2013 by itraining

G'day everybody



Has anyone encountered the "invalid CEN header (bad signature)" error using FMSAv12 ( and more important, found a workaround?



Using my testing server (FMSA12 on my iMac), I attempted to upload 6 databases.

Launching the "Admin Console" from the web browser (localhost:16000) I got an "update Java" prompt.

This update installed OK. I didn't catch the version but I guess it is the Java 7 Update 11 advertised recently (see below).


Java Update (Version 7 Update 11) Addresses Security Vulnerability

ATTENTION: FileMaker Server 11 and 12, and FileMaker Server 11 and 12 Advanced users are advised to download and install this update. ISSUE: A vulnerability in Java 7, that can be exploited through web browsers on the Mac, has been reported. WORKAROUND: Oracle has released a Java update (Version 7 Update 11) to address this security concern. Download thisupdate


Visually inspecting the progress, the dialog box indicated that 5 of the 6 databases appeared to upload successfully.

The 6th database looked like it had completed uploading when the "invalid CEN header (bad signature)" dialog box appeared (see attachment).

As a result, 0 of the databases were actually uploaded (even the folder I created for the databases disappeared).


Quit the Admin Console, relaunched it from the web browser (localhost:16000).

This time I got a "Java version insecure" prompt (see attached screenshot).

The updater installed Java 7 Update 13 successfully.


Relaunched Admin Console from the web browser (localhost:16000).

Attempted to upload the 6 databases again and got to the "successfully uploaded" screen.

Closer inspection revealed:

(a) only 5 of the 6 databases had actually uploaded

(b) only 4 of the 5 uploaded databases were "Open". Not a big concern but 1 remained "closed" and had to be "opened" manually.


Finally, I attempted to upload the remaining (elusive) database.

Once again I got the "invalid CEN header (bad signature)" error.

Repeated attempts to upload the database consistently failed with the "invalid CEN header (bad signature)" error.



(a) restart the iMac (server). [FAIL]

(b) Save A Copy (compressed) of the database and attempt upload. [FAIL]

(c) crack open beer at 3 PM in the afternoon to calm my nerves. [SUCCESS]


If anyone else has encountered the "invalid CEN header (bad signature)" error using FMSAv12 ( I am hoping you can respond with a possible workaround?



Thanks in advance.




Michael Richards

Brisbane (Australia)