C# – MOSS 2007 — Invalid URL Exception SPSite.OpenWeb(…)

This may seem a bit trivial, but I have not been able to figure it out. I am opening up a SPSite and then trying to open up a SPWeb under that SPSite. This is working fine on the VPC, which has the same Site Collection/Site hierarchy, but on production, I get an exception telling me that the URL is invalid when I try the SPSite.OpenWeb(webUrl);. I have verified that the URL’s are correct.

The Code:

  try
        {
            SPSite scheduleSiteCol = new SPSite(branchScheduleURL);
            lblError.Text += Environment.NewLine + "Site Collection URL: " + scheduleSiteCol.Url;
            SPWeb scheduleWeb = scheduleSiteCol.OpenWeb(branchScheduleURL.Replace(scheduleSiteCol.Url, "")); //<--- Throws error on this line
            SPList scheduleList = scheduleWeb.GetList(branchScheduleURL + "/lists/" + SPContext.Current.List.Title);
            return scheduleList.GetItemById(int.Parse(testID));
        }
        catch (System.Exception ex)
        {
            lblError.Text += Environment.NewLine + ex.ToString();
            return null;
        }

Note:
branchScheduleURL is actually the whole URL that includes the URL of the Web as well.

The output + exception:

Site Collection URL: https://ourSite.com/mocc

System.ArgumentException: Invalid URL: /internal/scheduletool. at Microsoft.SharePoint.SPSite.OpenWeb(String strUrl, Boolean requireExactUrl) at Microsoft.SharePoint.SPSite.OpenWeb(String strUrl) at MOCCBranchScheduleListWeb.MOCCBranchScheduleListV3.GetConflictListItem(String branchScheduleURL, String testID)System.NullReferenceException: Object reference not set to an instance of an object. at MOCCBranchScheduleListWeb.MOCCBranchScheduleListV3.CheckForConflicts(String[] cfcFlags1, DateTime startTime, DateTime endTime, String[] cfcFlags2)

Note:
https://ourSite.com/mocc/internal/scheduletool is the SPWeb I am trying to open.

Am I missing something obvious? Any help would be greatly appreciated.

Thanks.