The 'STRING' input must be either a char row vector, a cell array of char row vectors, or a string array.

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mahesh reddy pundru 2021-6-26

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https://ww2.mathworks.cn/matlabcentral/answers/865695-the-string-input-must-be-either-a-char-row-vector-a-cell-array-of-char-row-vectors-or-a-string-a

评论： mahesh reddy pundru 2021-6-27

I am getting the error while dumping the simulink model in the dsp board. The 'STRING' input must be either a char row vector, a cell array of char row vectors, or a string array. I have been used simulink blocks but the error unable to find. Please suggest me what type of conditions this error willl appear and in which blocks it is possible to appear.

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mahesh reddy pundru 2021-6-26

=== Simulation (Elapsed: 11 sec) ===

### Starting build procedure for: single_motor_FOC_hardware

### Generating code and artifacts to 'Model specific' folder structure

### Generating code into build folder: D:\matlab1\Vectorcontrol\FOC IM\single_motor_FOC_hardware_ert_rtw

Warning:'Input Port 5' of 'single_motor_FOC_hardware/SVPWM/Scope' is not connected.

Warning:'Input Port 4' of 'single_motor_FOC_hardware/SVPWM/Scope2' is not connected.

Warning:'Input Port 4' of 'single_motor_FOC_hardware/Scope1' is not connected.

### Invoking Target Language Compiler on single_motor_FOC_hardware.rtw

### Using System Target File: C:\Program Files\MATLAB\R2020b\rtw\c\ert\ert.tlc

### Loading TLC function libraries

......

### Initial pass through model to cache user defined code

.....

### Caching model source code

...............................................................................

..........................................................

### Writing header file single_motor_FOC_hardware_types.h

### Writing source file single_motor_FOC_hardware.c

### Writing header file single_motor_FOC_hardware_private.h

### Writing header file single_motor_FOC_hardware.h

### Writing header file rtwtypes.h

### Writing header file multiword_types.h

### Writing header file rtGetNaN.h

### Writing source file rtGetNaN.c

### Writing header file rt_defines.h

### Writing header file rt_nonfinite.h

### Writing source file rt_nonfinite.c

### Writing header file rtGetInf.h

### Writing source file rtGetInf.c

### Writing source file single_motor_FOC_hardware_data.c

### Writing header file rtmodel.h

### Writing source file ert_main.c

### TLC code generation complete.

### Generating TLC interface API.

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### Creating data type transition file single_motor_FOC_hardware_dt.h

.......### Evaluating PostCodeGenCommand specified in the model

### Build procedure for single_motor_FOC_hardware aborted due to an error.

Top model targets built:

Model Action Rebuild Reason

=====================================================================================

single_motor_FOC_hardware Failed Code generation information file does not exist.

0 of 1 models built (0 models already up to date)

Build duration: 0h 0m 11.009s

Error:The 'STRING' input must be either a char row vector, a cell array of char row vectors, or a string array.

Peter O 2021-6-27

Mahesh,

If applicable, does this model run when the target is the PC and not the embedded system DSP? From the error it sounds like you have a block that is getting a bad input, either in the signal chain or in the input parameters. If the model also fails running on the PC as target you might get a better stack trace. Consider looking for places where you are manipulating any sort of text for display or using it in case switching. You can also turn on Show Datatypes on the View/Hide menu to see if there's a string spot getting a bad input.

mahesh reddy pundru 2021-6-27

Thank you for your replies, Lastly i found my mistake during hardware dump, somewhere I have sending data to workspace in scope. beacuse of that i have getting this error. I have sorted and saved in different file then it is running.

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