ssg.billy.aps.getApartmentSEOURL: err on step nr.800

Error on stack level 1: ssg.billy.aps.getApartmentSEOURL: err on step nr.800
mod_ssg.apartments.getApartmentSEOURL(String aucode, String addqsparams) in R:\DEV\cmscore\mod_ssg\apartments.cs:line 933
mod_ssg.ssg.renderHeader(String suggested_title, String known_keywords, String known_description) in r:\dev\cmscore\mod_ssg\ssg.cs:line 3524
mod_ssg.ssg.renderHeader(String suggested_title) in r:\dev\cmscore\mod_ssg\ssg.cs:line 3500
ASP.modules_ssg_default_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in c:\WWW\ssg_cmscore_billy_amsterdamlodging\modules\ssg\default.aspx:line 494
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer)
System.Web.UI.Page.Render(HtmlTextWriter writer)
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter)
System.Web.UI.Control.RenderControl(HtmlTextWriter writer)
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Error on stack level 2: ssg.billy.searchstate.buildSearchURL: err on step nr.600
mod_ssg.searchstate_data.buildSearchURL(String httppath, String[] qsparams) in R:\DEV\cmscore\mod_ssg\searchstate_data.cs:line 883
mod_ssg.apartments.getApartmentSEOURL(String aucode, String addqsparams) in R:\DEV\cmscore\mod_ssg\apartments.cs:line 931

Error on stack level 3: [SSG/Searchstate]Failed to set QS/pairs on step[110], orig.err: Method not found: 'Int32 BaseLib.uDateTime.combinedYR(System.Object)'.
mod_ssg.searchstate_data.setTo(pairs p, Boolean withoutDefaults) in R:\DEV\cmscore\mod_ssg\searchstate_data.cs:line 794
mod_ssg.searchstate_data.buildSearchURL(String httppath, String[] qsparams) in R:\DEV\cmscore\mod_ssg\searchstate_data.cs:line 831

Time: 21/05/2012 21:52:02
Server Name: SSGWEB01
Web Site Root Location : http://billycore.shortstay-apartment.com/
Web Site CMS Location : http://billycore.shortstay-apartment.com/admin/
System path: C:\WWW\ssg_cmscore_billy_amsterdamlodging\modules\ssg\

User Agent: CCBot/1.0 (+http://www.commoncrawl.org/bot.html)
User Host Info: 85.158.249.170=85.158.249.170
User Languages: en-us,en;q=0.5

Full request Uri string: /modules/ssg/default.aspx?ur=http://www.shortstay-apartment.com/barcelona-apartment/Paseo-del-Borne-Loft-A-apartment-Barcelona.html
Request method: GET
Bytes posted by user: 0