Restore problem

Hello, I am working on online 7.14 UD1. I would like to restore a dbspace but the command ontape -r -D ipptst_01 gives me the following error : Memory Fault There is no trace in the online.log file. I have checked the Unix kernel parameters that are OK. I have tried to check memory but it seems that there is no problem. I tried also to add shared memory segments : /users/informix> onmode -a 8192 /users/informix> onstat -g seg INFORMIX-OnLine Version 7.14.UD1 -- Online -- Up 00:07:05 -- 35680 Kbytes Segment Summary: (resident segments are not locked) id key addr size ovhd class blkused blkfree 524 1381713921 c03c5000 19955712 1160 R 2432 4 525 1381713922 c16cd000 8192000 732 V 305 695 274 1381713923 c21bc000 573440 616 M 67 3 19 1381713924 c2248000 8388608 732 V 1 1023 /users/informix> ontape -r -D ipptst_01 Memory fault /users/informix> onmode -a 8192 /users/informix> onstat -g seg INFORMIX-OnLine Version 7.14.UD1 -- Online -- Up 00:07:29 -- 43872 Kbytes Segment Summary: (resident segments are not locked) id key addr size ovhd class blkused blkfree 524 1381713921 c03c5000 19955712 1160 R 2432 4 525 1381713922 c16cd000 8192000 732 V 305 695 274 1381713923 c21bc000 573440 616 M 67 3 19 1381713924 c2248000 8388608 732 V 1 1023 20 1381713925 c2a48000 8388608 732 V 1 1023 /users/informix> ontape -r -D ipptst_01 Memory fault Thanks for your Help. Jean-Francois.