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User receives the %Warning: File not a valid executable for this system error message in c3661 or c3662 while attempting an IOS Software upgrade through TFTP


Core Issue

This error message may be caused by an issue with the TFTP server program or the image may be wrong for the router.


If the router is a Cisco 3661 or 3662 series, it could have an Enterprise or a Telco chassis.

To resolve this issue, perform these steps:

  1. Software versions cannot be interchanged between these two types of chassis and produce this error message. Before upgrading, identify the chassis type by issuing the show version command, as shown in this example:   
    3660#show version
    Cisco Internetwork Operating System Software
    IOS (tm) 3600 Software (C3660-TELCOENT-M), Version 12.1(5)T12,  RELEASE SOFTWARE (fc1)
    TAC Support:
    Copyright (c) 1986-2002 by Cisco Systems, Inc.
    Compiled Mon 04-Feb-02 09:14 by ccai
    Image text-base: 0x60008960, data-base: 0x615C0000

    ROM: System Bootstrap, Version 12.0(6r)T, RELEASE SOFTWARE (fc1)

    crnetoheatn1a1 uptime is 3 days, 21 hours, 33 minutes
    System returned to ROM by reload
    System image file is "flash:c3660-telcoent-mz.121-5.T12.bin"

    Cisco c3660-telco (R527x) processor (revision C0) with 254976K/7168K bytes of memory.
    Processor board ID JMX0620K1V0
    R527x CPU at 225Mhz, Implementation 40, Rev 10.0, 2048KB L2 Cache
    Bridging software.
    X.25 software, Version 3.0.0.
    SuperLAT software (copyright 1990 by Meridian Technology Corp).
    TN3270 Emulation software.

    3660 Chassis type: TELCO
    2 FastEthernet/IEEE 802.3 interface(s)
    2 Serial network interface(s)
    8 Low-speed serial(sync/async) network interface(s)
    64 terminal line(s)
    DRAM configuration is 64 bits wide with parity disabled.
    125K bytes of non-volatile configuration memory.
    65536K bytes of processor board System flash (Read/Write)
    16384K bytes of processor board PCMCIA Slot1 flash (Read/Write)

    Configuration register is 0x2102
    This example shows that the router is a Telco chassis. Therefore, any non-Telco Cisco IOS  Software image will not work on this router and the error message is displayed. In the same way, if it was an Enterprise chassis, a Telco Cisco IOS Software image would not work and the error message would be displayed.   
  2. Make sure the right image for the hardware has been downloaded by referring to the Find software compatible with my hardware section of Software Advisor as well as the Cisco IOS Upgrade Planner.     
  3. If the error message is still displayed after verifying the image for the hardware, perform these steps:      
    1. If you are using the Cisco TFTP server version 1.1, go to View > Options > Menu and uncheck the Show file transfer progress and Enable logging checkboxes.             
    2. Try the TFTP transfer again. If the message still appears, try another TFTP server program or answer n when prompted to abort the copy, as shown in this example:            
      %Warning: File not a valid executable for this system
      Abort Copy? [confirm] n
      Note: This should cause no problem as long as the image is actually the correct image for the hardware.


  Can you please help me why the below image is not booting on 7204VXR?


Test#sh run | i boot


boot system disk2:c7200-advipservicesk9-mz.122-33.SRD8.bin

boot system disk2:c7200p-spservicesk9-mz.124-24.T5.bin






Test#ssh ver

Test#ssh ver

% No user specified nor available for SSH client

Test#sh ver

Test#sh version

Cisco IOS Software, 7200 Software (C7200P-SPSERVICESK9-M), Version 12.4(24)T5, RELEASE SOFTWARE (fc3)

Technical Support:

Copyright (c) 1986-2011 by Cisco Systems, Inc.

Compiled Fri 04-Mar-11 07:11 by prod_rel_team

ROM: System Bootstrap, Version 12.4(12.2r)T, RELEASE SOFTWARE (fc1)

Test uptime is 31 minutes

System returned to ROM by reload at 04:50:37 UTC Sun Jul 8 2001

System image file is "disk2:c7200p-spservicesk9-mz.124-24.T5.bin"

Last reload reason: Reload Command

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

If you require further assistance please contact us by sending email to

Cisco 7204VXR (NPE-G2) processor (revision A) with 917504K/65536K bytes of memory.

Processor board ID 25860330

MPC7448 CPU at 1666Mhz, Implementation 0, Rev 2.2

4 slot VXR midplane, Version 2.5

Last reset from power-on

PCI bus mb1 (Slots 1, 3 and 5) has a capacity of 600 bandwidth points.

Current configuration on bus mb1 has a total of 0 bandwidth points.

This configuration is within the PCI bus capacity and is supported.

PCI bus mb2 (Slots 2, 4 and 6) has a capacity of 600 bandwidth points.

Current configuration on bus mb2 has a total of 0 bandwidth points.

This configuration is within the PCI bus capacity and is supported.

Please refer to the following document "Cisco 7200 Series Port Adaptor

Hardware Configuration Guidelines" on <>

for c7200 bandwidth points oversubscription and usage guidelines.

1 FastEthernet interface

3 Gigabit Ethernet interfaces

2045K bytes of NVRAM.

250880K bytes of ATA PCMCIA card at slot 2 (Sector size 512 bytes).

65536K bytes of Flash internal SIMM (Sector size 512K).

Configuration register is 0x2102


Test# sh inve

Test# sh inventory

NAME: "Chassis", DESCR: "Cisco 7204VXR, 4-slot chassis"

PID: CISCO7204VXR      , VID:    , SN: 25860330  

NAME: "NPE-G2 0", DESCR: "Cisco 7200 Series Network Processing Engine NPE-G2"

PID: NPE-G2            , VID: V03 , SN: JAF1518BMBJ

NAME: "disk2", DESCR: "256MB Compact Flash Disk for NPE-G2"

PID: MEM-NPE-G2-FLD256 , VID:    , SN:           

NAME: "Power Supply 1", DESCR: "Cisco 7200 AC Power Supply"

PID: PWR-7200-AC       , VID:    , SN:           

NAME: "Power Supply 2", DESCR: "Cisco 7200 AC Power Supply"

PID: PWR-7200-AC       , VID:    , SN:           


Test#sh dis

Test#sh disk2:

-#- --length-- -----date/time------ path

2     32490656 Sep 02 2012 15:22:26 c7200p-spservicesk9-mz.124-24.T5.bin

3     25706876 Jul 08 2001 04:48:00 c7200-advipservicesk9-mz.122-33.SRD8.bin

195047424 bytes available (61411328 bytes used)


My boot systerm is pointed into second image but not picking into the ADVIPSERVICES image.

is there any compatible issues here?

We bought router with service provider image.