AbleCommerce Shopping Cart Software

Running R12 Build 9168 and this error showed up in our logs. I've traced this back and could not find any understanding to the error. Checked server logs and nothing again. Can anyone from AbleCommerce give some type of feedback to this error. It has only showed up once.
Thanks Again for you help.

Severity: Error
Message: An error has occured at Https://XXX.com/_common/services/common ... 51.asmx/js
Exception: No web service found at: /_common/services/commonproxywebservice.vda00c51.asmx.
Stack Trace: at System.Web.Script.Services.WebServiceData.GetWebServiceData(HttpContext context, String virtualPath, Boolean failIfNoData, Boolean pageMethods, Boolean inlineScript) at System.Web.Script.Services.WebServiceClientProxyGenerator.GetClientProxyScript(HttpContext context)
at System.Web.Script.Services.RestClientProxyHandler.ProcessRequest(HttpContext context) at system.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Do you have any customization in your store? It doesn't seems like out of the box web service related code.

Mazhar
Thank you for the reply. The only customization is in the Header & Footer's. After further research it appears to be a BOT coming from overseas. It must be digging for something and threw this error. So this is not a Able internal error. At this time no further errors on this since my last post. Will posted back on this topic if anything further comes up.
Thank You again for your help.
Rick L.