# GRMON 4.1.0 issues **URL:** \ **Category:** General - Software\ **Created:** [23 January 2026 10:46 UTC](https://discourse.grlib.community/t/grmon-4-1-0-issues/553 "2026-01-23T10:46:50Z")\ **Posts on this page:** 3\ **Page:** 1

**Author:** ![MarcSB](https://avatars.discourse-cdn.com/v4/letter/m/bbe5ce/32.png) [@MarcSB](https://discourse.grlib.community/u/MarcSB)\ **Post date:** [23 January 2026 10:46 UTC](https://discourse.grlib.community/t/grmon-4-1-0-issues/553/1 "2026-01-23T10:46:50Z")

Hello all, We have detected an issue when updating GRMON evaluation to version 4.1.0 (or 4.1.0.1). When we execute our ethernet initialization script we get the following error: ```auto Device index: greth0 EDCL ip 192.168.220.4 EDCL mac 03:00:00:00:00:00 EDCL buffer size 16 kB Device not found! ``` When trying to execute any program we also encounter an error: ```auto grmon4> run ERROR! JTAG data invalid! AHB access did not complete, returning bad data.! Error occurred, disconnecting (308 Unknown failure! Debug link has disconnected! ``` Note that with GRMON 4.0.7 this issues does not happen and the execution works as expected. **Edit:** I added a format for the GRMON messages. **Edit 2:** This happens on our custom platform (METASAT). On a simple noelvmp platform, it seems to work correctly. Thanks for your help. Best, Marc ---

**Author:** ![arvid](https://dub1.discourse-cdn.com/flex017/user_avatar/discourse.grlib.community/arvid/32/12_2.png) [@arvid](https://discourse.grlib.community/u/arvid)\ **Post date:** [29 January 2026 06:59 UTC](https://discourse.grlib.community/t/grmon-4-1-0-issues/553/2 "2026-01-29T06:59:26Z")

Hi Marc, Which cores are included in your design? Could you provide the output of info sys? ---

**Author:** ![MarcSB](https://avatars.discourse-cdn.com/v4/letter/m/bbe5ce/32.png) [@MarcSB](https://discourse.grlib.community/u/MarcSB)\ **Post date:** [29 January 2026 10:53 UTC](https://discourse.grlib.community/t/grmon-4-1-0-issues/553/3 "2026-01-29T10:53:12Z")

Hi, Find below the info sys output: ```auto cpu0 Frontgrade Gaisler NOEL-V RISC-V Processor AHB Master 0 cpu1 Frontgrade Gaisler NOEL-V RISC-V Processor AHB Master 1 cpu2 Frontgrade Gaisler NOEL-V RISC-V Processor AHB Master 2 cpu3 Frontgrade Gaisler NOEL-V RISC-V Processor AHB Master 3 greth0 Frontgrade Gaisler GR Ethernet MAC AHB Master 4 APB: ff984000 - ff984100 IRQ: 5 edcl ip 192.168.220.4, buffer 16 kbyte ahbuart0 Frontgrade Gaisler AHB Debug UART AHB Master 6 APB: ff986000 - ff986100 Baudrate 115200, AHB frequency 100.00 MHz ahbjtag0 Frontgrade Gaisler JTAG Debug Link AHB Master 7 edcl0 Frontgrade Gaisler EDCL master interface AHB Master 8 dm0 Frontgrade Gaisler RISC-V Debug Module AHB Master 9 AHB: fe000000 - ff000000 AHB trace: 7340036 lines, 128-bit bus hart0: ISA rv64imafdcbph, Modes M S U VS VU, SV39 i, m, a, f, d, c, h, smepmp, smstateen, sscofpmf, sstc svinval, zaamo, zalrsc, zba, zbb, zbc, zbkb, zbkx, zbs zca, zcd, zicbom, zicfilp, zicfiss, zicntr, zicond zifencei, zihpm, zimop Stack pointer 0x7ffffff0 icache 4 * 4 kB, 32 B/line, dir, dcache 4 * 4 kB, 32 B/line, dir 5 triggers, itrace 64 lines hart1: ISA rv64imafdcbph, Modes M S U VS VU, SV39 i, m, a, f, d, c, h, smepmp, smstateen, sscofpmf, sstc svinval, zaamo, zalrsc, zba, zbb, zbc, zbkb, zbkx, zbs zca, zcd, zicbom, zicfilp, zicfiss, zicntr, zicond zifencei, zihpm, zimop Stack pointer 0x7ffffff0 icache 4 * 4 kB, 32 B/line, dir, dcache 4 * 4 kB, 32 B/line, dir 5 triggers, itrace 64 lines hart2: ISA rv64imafdcbph, Modes M S U VS VU, SV39 i, m, a, f, d, c, h, smepmp, smstateen, sscofpmf, sstc svinval, zaamo, zalrsc, zba, zbb, zbc, zbkb, zbkx, zbs zca, zcd, zicbom, zicfilp, zicfiss, zicntr, zicond zifencei, zihpm, zimop Stack pointer 0x7ffffff0 icache 4 * 4 kB, 32 B/line, dir, dcache 4 * 4 kB, 32 B/line, dir 5 triggers, itrace 64 lines hart3: ISA rv64imafdcbph, Modes M S U VS VU, SV39 i, m, a, f, d, c, h, smepmp, smstateen, sscofpmf, sstc svinval, zaamo, zalrsc, zba, zbb, zbc, zbkb, zbkx, zbs zca, zcd, zicbom, zicfilp, zicfiss, zicntr, zicond zifencei, zihpm, zimop Stack pointer 0x7ffffff0 icache 4 * 4 kB, 32 B/line, dir, dcache 4 * 4 kB, 32 B/line, dir 5 triggers, itrace 64 lines apbmst0 Frontgrade Gaisler AHB/APB Bridge AHB: ff900000 - ffa00000 l2cache0 Frontgrade Gaisler L2-Cache Controller - Lite AHB: 00000000 - 80000000 AHB: ffff0000 - ffff0400 L2C: 1-ways, cachesize: 128 kB ahbrom0 Frontgrade Gaisler Generic AHB ROM AHB: c0000000 - c0100000 32-bit ROM: 1 MB @ 0xc0000000 mig0 Frontgrade Gaisler Xilinx MIG Controller AHB: 00000000 - 80000000 SDRAM: 2048 Mbyte clint0 Frontgrade Gaisler RISC-V ACLINT AHB: e0000000 - e0100000 plic0 Frontgrade Gaisler RISC-V PLIC AHB: f8000000 - fc000000 16 contexts, 31 interrupt sources, 7 max priority uart0 Frontgrade Gaisler Generic UART APB: ff900000 - ff900100 IRQ: 1 Baudrate 38343, FIFO debug mode available gptimer0 Frontgrade Gaisler Modular Timer Unit APB: ff908000 - ff908100 IRQ: 2 16-bit scaler, 2 * 32-bit timers, divisor 100 version0 Frontgrade Gaisler Version and Revision Register APB: ff981000 - ff981100 Version 1024, Revision 130 ahbstat0 Frontgrade Gaisler AHB Status Register APB: ff982000 - ff982100 IRQ: 4 sgmii0 Frontgrade Gaisler XILINX SGMII Interface APB: ff985000 - ff986000 uart1 Frontgrade Gaisler Generic UART APB: ff9e0000 - ff9e0100 IRQ: 7 Baudrate 38343, FIFO debug mode available uart2 Frontgrade Gaisler Generic UART APB: ff9f0000 - ff9f0100 IRQ: 8 Baudrate 38343, FIFO debug mode available ```