SRAM faut injection

Hello everybody,

“For platform RAM, the intent is to generate errors during data write cycles, such that subsequent reads of the corrupted address locations generate ECC events, either single-bit corrections or double-bit non-correctable errors that are terminated with an error response.�?

So, I coded (I put the related assembly too):

SPP_MCM.ECR.R=0x33;  \\to activate reportings

0x00001D7E:   70 1F E7 F4  E_LIS     R0,0xFFF4

0x00001D82:   4B 37        SE_LI     R7,0x33

0x00001D84:   01 06        SE_MR     R6,R0

0x00001D86:   34 E6 00 43  E_STB     R7,0x43(R6)

SPP_MCM.EEGR.B.FR11BI=1;   \\ injection

0x00001D8A:   70 FF E7 F4  E_LIS     R7,0xFFF4

0x00001D8E:   50 07 00 48  E_LWZ     R0,0x48(R7)  

0x00001D92:   48 16        SE_LI     R6,0x1

0x00001D94:   74 C0 64 E6  E_RLWIMI  R0,R6,0xC,0x13,0x13

0x00001D98:   54 07 00 48  E_STW     R0,0x48(R7)

But, execution of instruction at 0x00001D8E causes hangs in

_unhandled_exception:0x000003A0:   78 00 00 00  E_B       _unhandled_exception (0x000003A0))

This is not the expected behavior, what is going wrong?