How to fix Calibre PEX problem?

Hello,

I'm designing a chip with AMS high voltage 0.35um process. I am using calibre for verification. I have passed LVS. But when I do PEX, I got some warnings and PEX will be terminated. Here are the warnings:

WARNING: PEX BACKANNOTATION is obsolete. Please remove from your ruledeck.
WARNING: PEX BACKANNOTATION is obsolete. Please remove from your ruledeck.
WARNING: PEX BACKANNOTATION is obsolete. Please remove from your ruledeck.
WARNING: PEX BACKANNOTATION is obsolete. Please remove from your ruledeck.
WARNING: PEX BACKANNOTATION is obsolete. Please remove from your ruledeck.
WARNING: PEX BACKANNOTATION is obsolete. Please remove from your ruledeck.
WARNING: Layer 35 contains unmapped objects and is the source layer of LAYER MAP == 35 DATATYPE == 1.
WARNING: Layer 37 contains unmapped objects and is the source layer of LAYER MAP == 37 DATATYPE == 1.
WARNING: Layer 39 contains unmapped objects and is the source layer of LAYER MAP == 39 DATATYPE == 1.
WARNING: Layer 42 contains unmapped objects and is the source layer of LAYER MAP == 42 DATATYPE == 1.

My calibre version is v2008.3_34.24 and my cadence version is 5.10.41. Anybody knows how to fix this problem? Thanks.

calibre pex

I checked the PIPO.LOG file, no error is found.
Calibre PEX quit with such a message:

*** Calibre finished with Error: bus error ***

But what is a bus error and how to remove it? Thanks in advance for your help.