Display the Signature SDK license
To display the license used in your application use the
Click the application icon then select About...
The About dialog displays:
- Signature Component Version
- License information
Remove 'Evaluation' watermark on signatures
An 'Evaluation' watermark is displayed in the signature background:
To remove the watermark install a Commercial or Enterprise license.
To obtain a license see: Licensing
To install a new license see: How to install a license
To view the license used in an application click the green icon in the Signature Capture window, then
No valid signature capture licence found
When running a signature application built for use with the Wacom Signature SDK this error can occur in the following situations:
- No signature pad is connected to the PC
- A signature pad is connected but Windows does not recognise it (this will probably show as an error in Device Manager)
- A signature pad is connected but it wasn't manufactured by Wacom
- You are using a touch-screen PC or laptop which does not have a Wacom digitizer - please contact the manufacturer if there is doubt about this
- The licence string is invalid, e.g. it has expired or has characters missing or added (please paste it into https://jwt.io to check its validity)
- The new style long licence string is being used with an old release of the SDK which only supports the old style short string. The long JWT licences are only supported from release 3.19.0 onwards.
- You are trying to run your application over Remote Desktop or Citrix and the signature pad isn't being forwarded over the network.
For further information please see Use Citrix for signature capture
- You are using a virtual machine which isn't forwarding the signature pad data to the virtual operating system
- Install the latest version of the Signature SDK and insert a valid licence string as described at How to install a license.
A production licence for the Signature SDK (Lite version) can be obtained from the GETTING STARTED.md document on GitHub.
If you do not wish to upgrade to the latest release of the SDK then it is possible to continue using the old style short licence. Please raise a Support Ticket to obtain one.
- Ensure that you are using a signature capture device (digitizer or tablet) manufactured by Wacom
- If you are using Remote Desktop ensure that the pad data is being forwarded over the network (see the Remote Desktop FAQ above)
- If you are using Citrix make sure that the signature pad is supported - see Signature Devices supported on Citrix
- If you are using a VM make sure that the signature pad is being successfully redirected to it - not all VM software does this automatically
My production licence does not work
The production licence which I obtained from the Signature SDK samples on GitHub does not work. I get an error message saying that the licence is invalid or no tablet is found.
The long-style production licence which is provided on GitHub will not work with releases of the Signature SDK prior to 3.20.4.
There are two solutions:
Upgrade to the latest release of the Signature SDK which is available under "For signature" at https://developer.wacom.com/en-us/developer-dashboard/downloads
If you are unable to upgrade please request an old-style short licence by raising a Support Ticket.
How to install a license
The license is supplied as a text string in a download file, for example:
Modify the application code to add the licence is illustrated below:
As illustrated in TestSDKCapture.html use the following syntax:
Similarly, if in use the Wizard control must also be licensed:
wizCtl = new WizCtl(); wizCtl.licence = "licence_string";
SigCtl sigCtl = new SigCtl(); sigCtl.licence("licence_string");
SigCtl sigCtl = new SigCtl(); sigCtl.Licence = "licence_string";
Dim sigCtl As New SigCtl sigCtl.Licence = "licence_string"
sigCtl := TSigCtl.Create(Self); sigCtl.Licence := 'licence_string';
Note that Delphi TString is limited to 255 characters so you need to cut the licence up into consecutive strings, e.g.
_string := 'first part of the license' + 'another part of the licence' + '.....' + 'last part of the license.';
As illustrated in SigCaptX-SessionControl.js use the following code structure:
If you are also using the WizCtl make sure that the licence string is applied to it in the same way, i.e.
To make it easier to find the place where the licence string must be inserted in the sample code search for the string "<
The SDK samples can be downloaded from the Signature SDK and SigCaptX GitHub repositories.
To view the licence used in an application click the green icon in the Signature Capture window, then
How can I get rid of the "Evaluation" watermark which appears on my pad?
The evaluation watermark image appears if you do not specify a licence key in your application code or if you use a non-Wacom signature pad.
The solution is to insert your licence string at the appropriate place in your application code.
If you are using one of the non-Wacom signature pads which we support such as the ePad-ink this needs a special licence which must be purchased from Wacom and applied within the code.
If no licence is applied, then by default a watermark saying "Evaluation" will appear on the signatures.
A production licence for the standard Signature SDK and SigCaptX is provided in the GETTING STARTED document alongside the sample code at https://github.com/Wacom-Developer/sdk-for-signature-windows
The need for a licence key when using Wacom signature devices was removed with release 1.23.3 of the Signature SDK but reintroduced with release 3.13.2.
If you have an older release than 1.23.3 then removing the licence string from your code will not resolve the issue.
From 3.13.2 until 3.20.3 a short-style licence is required and the later, long-style licence (as provided on GitHub and on developer.wacom.com) will not work.
If you are using a release within the above range and do not want to upgrade your SDK please raise a support ticket (see link below) and request a short-style production licence.
If you have any further queries please raise a Support Ticket.
"LQ Wizard not licensed" or "DynCaptNotLicensed" error message
The most likely explanation for this error is that you have not installed the Signature SDK components on the PC where you are trying to capture a signature.
You must install the SDK as well as your signature application.
How do I obtain a licence for the Signature SDK and how much does it cost?
You can download evaluation licences from our Developer Relations Web site licensing section
These are normally valid for six months after which you can renew them or request a full licence.
A production licence for the standard Signature SDK and SigCaptX is provided in the GETTING STARTED document alongside the sample code at https://github.com/Wacom-Developer/sdk-for-signature-windows.
Production licences are normally free unless you want to use the signature ISO format or data encryption functionality which was introduced very recently to the product or you want to use non-Wacom pen input devices.
For details of the ISO and encryption enhancements please see the sections on "Signature Data Encryption" and Signature ISO Format" in the Signature Components API reference document which is provided in the "documentation" folder of the Signature SDK installation file.
The SDK itself can be downloaded at https://developer.wacom.com/en-us/developer-dashboard/downloads under "For signature".
Production licenses must be obtained from your regional Wacom internal sales contact. If you don't know who this is please contact the Wacom Solutions Team at email@example.com for assistance.
A full commercial licence is permanent i.e. there is no need to renew or replace it.
It is also valid for every PC on which you install your application once you have included the license string in your code.
How can I deploy the Signature SDK and how many licences do I need?
In order to deploy a Signature SDK licence for use with your application in a live environment you must include the licence key in your application code.
You only need one licence key - this will enable signature capture on any PC where your application is installed.
A full licence is permanent - there is no need to renew it and it does not expire.
How to obtain the Static (SSV) or Dynamic (DSV) Signature Verification SDK
To obtain the SSV (Static Signature Verification) or DSV (Dynamic Signature Verification) SDK please send an email to the Wacom Solutions Team at firstname.lastname@example.org or contact your regional Wacom Business Development Manager.