ORA-04062: Signature of package ... has been changed

We've had a repeated situation where an unaltered package spec has been recompiled, which was in excess since only the package body has incurred a change. But, our Oracle Forms application throws the ORA-04062 error nonetheless when trying to access the package.
I originally assumed that the spec had actually changed when this error came up, and didn't do any additional research. But this time around, I checked, and only the package body is different. The spec, though compiled, is identical to the version that was there prior.
What makes up the "signature" and why does Forms keep thinking that a recompile equates to a signature change?
--=Thanks
Chuck

chuckers wrote:
We've had a repeated situation where an unaltered package spec has been recompiled, which was in excess since only the package body has incurred a change. But, our Oracle Forms application throws the ORA-04062 error nonetheless when trying to access the package.
I originally assumed that the spec had actually changed when this error came up, and didn't do any additional research. But this time around, I checked, and only the package body is different. The spec, though compiled, is identical to the version that was there prior.
What makes up the "signature" and why does Forms keep thinking that a recompile equates to a signature change?
--=Thanks
Chuck
04062, 00000, "%s of %s has been changed"
// *Cause: Attempt to execute a stored procedure to serve
// an RPC stub which specifies a timestamp or signature that is
// different from the current timestamp/signature of the procedure.
// *Action: Recompile the caller in order to pick up the new timestamp.default behavior is TIMESTAMP change which can be over rode to
only force (re)compile what number or parameter type changes

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The only solution we found right now is to restart the tomcat on application servers. This sounds to me as though TomCat is caching information about procedures & functions & does not know they have changed.
04062, 00000, "%s of %s has been changed"
// *Cause: Attempt to execute a stored procedure to serve
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Existing state of packages has been discarded...

Hi all,
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I'm compiling both header and body for both packages.
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BluShadow wrote:
Karthick_Arp wrote:
Sudhakar P wrote:
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