Oops, i think it is because i abused of allpass filters in the reverb. They tend to eat a large amount of internal SRAM (that's why SDRAM should be used for long allpass and delays).
To free some RAM, you can edit the reverb object:
and suppress these two big allpass filters:
and reconnect the others:
once done, don't forget to click on the "update" button of the reverb patcher object (i often forget to do it...).
Hope it will free enough RAM.