Cannot use butter.m even though i have the signal processing toolbox (Matlab 2019b)

ver output:

MATLAB Version: 9.7.0.1737446 (R2019b) Update 9
MATLAB License Number: XXXXXX
Operating System: Microsoft Windows 10 Enterprise Version 10.0 (Build 19045)
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
-----------------------------------------------------------------------------------------------------
MATLAB                                                Version 9.7         (R2019b)
Simulink                                              Version 10.0        (R2019b)
Control System Toolbox                                Version 10.7        (R2019b)
Curve Fitting Toolbox                                 Version 3.5.10      (R2019b)
DSP System Toolbox                                    Version 9.9         (R2019b)
Embedded Coder                                        Version 7.3         (R2019b)
Fixed-Point Designer                                  Version 6.4         (R2019b)
GUI Layout Toolbox                                    Version 2.3.4       (R2018b)
Image Processing Toolbox                              Version 11.0        (R2019b)
Instrument Control Toolbox                            Version 4.1         (R2019b)
MATLAB Coder                                          Version 4.3         (R2019b)
MATLAB Compiler                                       Version 7.1         (R2019b)
MATLAB Compiler SDK                                   Version 6.7         (R2019b)
MATLAB Report Generator                               Version 5.7         (R2019b)
OPC Toolbox                                           Version 4.0.8       (R2019b)
Optimization Toolbox                                  Version 8.4         (R2019b)
Signal Processing Toolbox                             Version 8.3         (R2019b)
SimEvents                                             Version 5.7         (R2019b)
Simscape                                              Version 4.7         (R2019b)
Simscape Electrical                                   Version 7.2         (R2019b)
Simulink Check                                        Version 4.4         (R2019b)
Simulink Coder                                        Version 9.2         (R2019b)
Simulink Control Design                               Version 5.4         (R2019b)
Simulink Coverage                                     Version 4.4         (R2019b)
Simulink Report Generator                             Version 5.7         (R2019b)
Simulink Requirements                                 Version 1.4         (R2019b)
Simulink Test                                         Version 3.1         (R2019b)
Stateflow                                             Version 10.1        (R2019b)
Statistics and Machine Learning Toolbox               Version 11.6        (R2019b)
Symbolic Math Toolbox                                 Version 8.4         (R2019b)
System Composer                                       Version 1.1         (R2019b)

shows butter.m as part of the signal processing toolbox:

when I try to use the function I get this error:

butter(4, 1000)
License checkout failed.
License Manager Error -4
Maximum number of users for Signal_Toolbox reached.
Try again later.

Troubleshoot this issue by visiting:
https://www.mathworks.com/support/lme/R2019b/4

Diagnostic Information:
Feature: Signal_Toolbox

There it says it is part of the "Signal Toolbox" not the "Signal Processing Toolbox" which is odd.

How can I use this function using my acquired Signal Processing Toolbox?

PS:

There is no "Signal Toolbox", I can't even find it in this help page. In the drop down for affected products I cannot select "Signal Toolbox". Only options containing "signal" are "Signal Processing Toolbox", "Mixed Signal Blockset" and "Signal Integrity Toolbox".

Answer 1

[Manikanta Aditya]

Hi @Friedrich Welck,

Your license only allows a certain number of users to use Signal Processing Toolbox simultaneously. That many users are using Signal Processing Toolbox right now. You will need to wait until one of those users is done using the toolbox. If your need is urgent contact your license administrator (probably someone in the IT department) and see if they can determine who's using the toolbox right now and ask one of those users to let you use the license.

Even for Image procesing toolbox it says Image_Toolbox if you see the below MATLAB answer, looks like they are using first word. So maybe that's why you also see Signal toolbox not Signal processing toolbox.

Refer to the following MATLAB Answer which talks about same issue but for Image Processing toolbox:

• Matlab Error License Manager Error -4 - MATLAB Answers - MATLAB Central
• Licensing error -4,132 - MATLAB Answers - MATLAB Central

Some other references:

• matlab - License error manager-4 - Stack Overflow

I hope this helps.

[Friedrich Welck]

This might be the case.

I was confused because I have a local and a network license and the Signal Processing Toolbox showed under my local license and not the network license.

ver shows my local license number but also lists the network license toolboxes.

Listing the toolboxes seperately for each license might clear that up.

I would suggest and output like this:

-----------------------------------------------------------------------------------------------------
MATLAB Version: 9.7.0.1737446 (R2019b) Update 9
MATLAB License Number: local_license
Operating System: Microsoft Windows 10 Enterprise Version 10.0 (Build 19045)
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
-----------------------------------------------------------------------------------------------------
MATLAB                                                Version 9.7         (R2019b)
Simulink                                              Version 10.0        (R2019b)
Control System Toolbox                                Version 10.7        (R2019b)
Simscape                                              Version 4.7         (R2019b)
Simscape Electrical                                   Version 7.2         (R2019b)
Stateflow                                             Version 10.1        (R2019b)
-----------------------------------------------------------------------------------------------------
MATLAB Version: 9.7.0.1737446 (R2019b) Update 9
MATLAB License Number: network_license
Operating System: Microsoft Windows 10 Enterprise Version 10.0 (Build 19045)
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
-----------------------------------------------------------------------------------------------------
Curve Fitting Toolbox                                 Version 3.5.10      (R2019b)
DSP System Toolbox                                    Version 9.9         (R2019b)
Embedded Coder                                        Version 7.3         (R2019b)
Fixed-Point Designer                                  Version 6.4         (R2019b)
GUI Layout Toolbox                                    Version 2.3.4       (R2018b)
Image Processing Toolbox                              Version 11.0        (R2019b)
Instrument Control Toolbox                            Version 4.1         (R2019b)
MATLAB Coder                                          Version 4.3         (R2019b)
MATLAB Compiler                                       Version 7.1         (R2019b)
MATLAB Compiler SDK                                   Version 6.7         (R2019b)
MATLAB Report Generator                               Version 5.7         (R2019b)
OPC Toolbox                                           Version 4.0.8       (R2019b)
Optimization Toolbox                                  Version 8.4         (R2019b)
Signal Processing Toolbox                             Version 8.3         (R2019b)
SimEvents                                             Version 5.7         (R2019b)
Simulink Check                                        Version 4.4         (R2019b)
Simulink Coder                                        Version 9.2         (R2019b)
Simulink Control Design                               Version 5.4         (R2019b)
Simulink Coverage                                     Version 4.4         (R2019b)
Simulink Report Generator                             Version 5.7         (R2019b)
Simulink Requirements                                 Version 1.4         (R2019b)
Simulink Test                                         Version 3.1         (R2019b)
Statistics and Machine Learning Toolbox               Version 11.6        (R2019b)
Symbolic Math Toolbox                                 Version 8.4         (R2019b)
System Composer                                       Version 1.1         (R2019b)