FormatException: Input string was not in a correct format

[JerOhm]

Hi,

I'm trying to run the sample scenes for the SRWorks v9.3.0 but I keep getting this error message:

FormatException: Input string was not in a correct format.
System.Number.ParseSingle (System.String value, System.Globalization.NumberStyles options, System.Globalization.NumberFormatInfo numfmt) (at <437ba245d8404784b9fbab9b439ac908>:0)
System.Single.Parse (System.String s, System.Globalization.NumberStyles style, System.Globalization.NumberFormatInfo info) (at <437ba245d8404784b9fbab9b439ac908>:0)
System.Single.Parse (System.String s) (at <437ba245d8404784b9fbab9b439ac908>:0)
Vive.Plugin.SR.ViveSR_DualCameraCalibrationTool.LoadParamsValue (System.Int32 angle_index, System.Single default_value) (at Assets/ViveSR/Scripts/ViveSR_DualCameraCalibrationTool.cs:196)
Vive.Plugin.SR.ViveSR_DualCameraCalibrationTool.LoadDeviceParameter () (at Assets/ViveSR/Scripts/ViveSR_DualCameraCalibrationTool.cs:136)
Vive.Plugin.SR.ViveSR_DualCameraRig.Initial () (at Assets/ViveSR/Scripts/ViveSR_DualCameraRig.cs:179)
Vive.Plugin.SR.ViveSR.UpdateWhileWorking () (at Assets/ViveSR/Scripts/ViveSR.cs:328)
Vive.Plugin.SR.ViveSR.Update () (at Assets/ViveSR/Scripts/ViveSR.cs:175)

It looks like there is something wrong when trying to read the parameters in the calibration file.

@Daniel_Y, @reneeclchen

[JerOhm]

Does anyone have the same problem?

@Daniel_Y @Jad

[reneeclchen]

Hi @JerOhm,

In SRWorks v0.9.3.0, we changed the format of this file: C:\Users\(USER NAME)\AppData\LocalLow\HTC Corporation\SR_Config\calibration_params.bin.

You may have an old .bin file, and therefore the old format, from an old version of SRWorks. Kindly delete the file. SRWorks will regenerate it in the format that can be correctly parsed.

[JerOhm]

Hi @reneeclchen,

I tried your solution and it works for the first execution after deleting the file because there is no calibration file to read. However, I still get the same error the following executions. For some reason, the format of the new calibration file still cannot be parsed. Any ideas why?

[reneeclchen]

@JerOhm,

Would you be so kind as to open the .bin file in Notepad and share the string in it with us? Thank you!

[JerOhm]

@reneeclchen,

This is the string:

0.0,0.0,0.0,0.0,0.0,0.0

There is a weird symbol at the beginning of the string but I couldn't paste it.

Thank you!

Edited July 21, 2020 by JerOhm

[reneeclchen]

@JerOhm,

It's most likely just how Unity's binaryreader and -writer work in different machines or operation systems. 

Since the calibration tool is an old feature and will be removed in later versions, I suggest these two steps:

(1) Remove the .bin file, and

(2) In ViveSR_DualCameraCalibrationTool.cs, slash out line 159 like this:

//SaveParamValue(relative_angle, absolute_angle);

The .bin file will then not be saved or loaded. It's not used anyway.

[carlhyde]

System.FormatException is a type of exception in the .NET framework. It is thrown when an invalid format is encountered while parsing a string representation of a data type. For example, if you try to parse a string that is not a valid integer representation using the int.Parse() method (string to int) , it will throw a System.FormatException. The exception indicates that the string does not conform to the expected format for the type being parsed.

To fix a System.FormatException in your code, you need to handle the exception and provide an appropriate solution based on the scenario