filterDesigner does not open: Value must be a handle

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Leonard
Leonard on 10 Oct 2025 at 19:52
Answered: Anjaneyulu Bairi ungefär 15 timmar ago
I have MATLAB 2025a license. When I try to use filerDesigner and I type "filterDesigner" in the command window, I get the error message:
I type:
---------------------------------------------
>> filterDesigner
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I get:
Error using filterDesigner (line 85)
Value must be a handle.
--------------------------------------------
  1 Comment
Torsten
Torsten on 10 Oct 2025 at 20:13
Edited: Torsten on 10 Oct 2025 at 22:41
Ran in:
Do you have the Signal Processing Toolbox licenced and installed ?
What do you get if you type
ver
------------------------------------------------------------------------------------------------- MATLAB Version: 25.2.0.3007325 (R2025b) Update 1 MATLAB License Number: 40912989 Operating System: Linux 6.8.0-1019-aws #21~22.04.1-Ubuntu SMP Thu Nov 7 17:33:30 UTC 2024 x86_64 Java Version: Java 1.8.0_292-b10 with AdoptOpenJDK OpenJDK 64-Bit Server VM mixed mode ------------------------------------------------------------------------------------------------- MATLAB Version 25.2 (R2025b) Simulink Version 25.2 (R2025b) 5G Toolbox Version 25.2 (R2025b) Aerospace Blockset Version 25.2 (R2025b) Aerospace Toolbox Version 25.2 (R2025b) Antenna Toolbox Version 25.2 (R2025b) Audio Toolbox Version 25.2 (R2025b) Automated Driving Toolbox Version 25.2 (R2025b) Bioinformatics Toolbox Version 25.2 (R2025b) Bluetooth Toolbox Version 25.2 (R2025b) Communications Toolbox Version 25.2 (R2025b) Computer Vision Toolbox Version 25.2 (R2025b) Control System Toolbox Version 25.2 (R2025b) Curve Fitting Toolbox Version 25.2 (R2025b) DO Qualification Kit Version 25.2 (R2025b) DSP System Toolbox Version 25.2 (R2025b) Database Toolbox Version 25.2 (R2025b) Datafeed Toolbox Version 25.2 (R2025b) Deep Learning Toolbox Version 25.2 (R2025b) Econometrics Toolbox Version 25.2 (R2025b) Embedded Coder Version 25.2 (R2025b) Financial Instruments Toolbox Version 25.2 (R2025b) Financial Toolbox Version 25.2 (R2025b) Fixed-Point Designer Version 25.2 (R2025b) Fuzzy Logic Toolbox Version 25.2 (R2025b) Global Optimization Toolbox Version 25.2 (R2025b) HDL Coder Version 25.2 (R2025b) HDL Verifier Version 25.2 (R2025b) IEC Certification Kit Version 25.2 (R2025b) Image Acquisition Toolbox Version 25.2 (R2025b) Image Processing Toolbox Version 25.2 (R2025b) Industrial Communication Toolbox Version 25.2 (R2025b) Instrument Control Toolbox Version 25.2 (R2025b) LTE Toolbox Version 25.2 (R2025b) MATLAB Coder Version 25.2 (R2025b) MATLAB Compiler Version 25.2 (R2025b) MATLAB Compiler SDK Version 25.2 (R2025b) MATLAB Report Generator Version 25.2 (R2025b) Mapping Toolbox Version 25.2 (R2025b) Medical Imaging Toolbox Version 25.2 (R2025b) Mixed-Signal Blockset Version 25.2 (R2025b) Model Predictive Control Toolbox Version 25.2 (R2025b) Model-Based Calibration Toolbox Version 25.2 (R2025b) Navigation Toolbox Version 25.2 (R2025b) Optimization Toolbox Version 25.2 (R2025b) Parallel Computing Toolbox Version 25.2 (R2025b) Partial Differential Equation Toolbox Version 25.2 (R2025b) Phased Array System Toolbox Version 25.2 (R2025b) Powertrain Blockset Version 25.2 (R2025b) Predictive Maintenance Toolbox Version 25.2 (R2025b) RF Blockset Version 25.2 (R2025b) RF Toolbox Version 25.2 (R2025b) Radar Toolbox Version 25.2 (R2025b) Requirements Toolbox Version 25.2 (R2025b) Risk Management Toolbox Version 25.2 (R2025b) Robotics System Toolbox Version 25.2 (R2025b) Robust Control Toolbox Version 25.2 (R2025b) Sensor Fusion and Tracking Toolbox Version 25.2 (R2025b) SerDes Toolbox Version 25.2 (R2025b) Signal Processing Toolbox Version 25.2 (R2025b) SimBiology Version 25.2 (R2025b) SimEvents Version 25.2 (R2025b) Simscape Version 25.2 (R2025b) Simscape Driveline Version 25.2 (R2025b) Simscape Electrical Version 25.2 (R2025b) Simscape Fluids Version 25.2 (R2025b) Simscape Multibody Version 25.2 (R2025b) Simulink 3D Animation Version 25.2 (R2025b) Simulink Check Version 25.2 (R2025b) Simulink Code Inspector Version 25.2 (R2025b) Simulink Coder Version 25.2 (R2025b) Simulink Control Design Version 25.2 (R2025b) Simulink Coverage Version 25.2 (R2025b) Simulink Design Optimization Version 25.2 (R2025b) Simulink Design Verifier Version 25.2 (R2025b) Simulink Desktop Real-Time Version 25.2 (R2025b) Simulink PLC Coder Version 25.2 (R2025b) Simulink Real-Time Version 25.2 (R2025b) Simulink Report Generator Version 25.2 (R2025b) Simulink Test Version 25.2 (R2025b) Stateflow Version 25.2 (R2025b) Statistics and Machine Learning Toolbox Version 25.2 (R2025b) Symbolic Math Toolbox Version 25.2 (R2025b) System Identification Toolbox Version 25.2 (R2025b) Text Analytics Toolbox Version 25.2 (R2025b) Vehicle Dynamics Blockset Version 25.2 (R2025b) Vehicle Network Toolbox Version 25.2 (R2025b) Vision HDL Toolbox Version 25.2 (R2025b) WLAN Toolbox Version 25.2 (R2025b) Wavelet Toolbox Version 25.2 (R2025b) Wireless HDL Toolbox Version 25.2 (R2025b)
and
status = license('test', 'Signal_Toolbox')
status = 1
Using the ver command, the Signal Processing Toolbox should appear in the list.
Using the licence test, the status variable should happen to be 1.

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Answers (1)

Anjaneyulu Bairi
Anjaneyulu Bairi ungefär 4 timmar ago
Hi,
There might be another file named filterDesigner.m created by you in your current folder or somewhere on your MATLAB path, which could be interfering with the built-in app.
Run this command to see which file MATLAB is accessing:
which filterDesigner -all
and, It should point out to MATLAB installation directory
(e.g., C:\ProgramFiles\MATLAB\R2025a\toolbox\signal\sigtools\filterDesigner.m)
If which shows the correct built-in function but the app still doesn't launch, there might be an issue with your MATLAB installation. Try resetting the MATLAB path and refreshing the toolbox cache:
restoredefaultpath; rehash toolboxcache
  • After running these commands, attempt to launch filterDesigner again.
  • If the problem remains, you may need to reinstall the Signal Processing Toolbox.
Hope this helps!

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