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LPC1756 problem with keil MDK 5.25.2.0 LPC1700_DFP 2.4.0

Sol

Hello
I have implemented a firmware that uses an LPC1756 with a file system on ssp0. I compiled the project via Keil MDK ver 24.0, LPC1700_DFP 2.3.0 MDK_Middledware 7.4.0. Everything worked well.
Now I have to update the firmware and I'm compiling with keil MDK 5.25.2.0 LPC1700_DFP 2.4.0 but it does not work anymore.
It gives me the following error "fsMediaError". But if I enter the old code, everything works fine. I loaded the example board MCB1700 - Middware - FileSystem - File_Demo and it happens that if I compile using an LPC1768 everything works if instead I compile on an LPC1756 gives me the error "fsMediaError" also loading LPC1700_DFP 2.3.0.

Also I downloaded a copy of an example MCB1700 - Middware - FileSystem - File_Demo and I compiled with MDK 5.26.2.0 Keil.LPC1700_DFP.2.4.0. In the original sample project, the LPC1768 device is selected and works,
if I try to change the device to LPC1756 the compiler works but the filesystem does not work.
Also in uVision appear icons with an error in RTEDevice.h, startup_LPC17xx.s and system_lpc17xx.c

Could someone give me an advise?
Regards
Sol