The ReportServerService_03_25_2019_00_05_25 log says this:
library!ReportServer_0-18!f1c!03/25/2019-11:44:21:: i INFO: RenderForNewSession(‘/Epicor10/reports/CustomReports/ARInvoiceForm/ARForm’)
library!ReportServer_0-18!f1c!03/25/2019-11:44:24:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.InternalCatalogException: ScalableList: Index 0 outside the allowed range [0::-1], Microsoft.ReportingServices.Diagnostics.Utilities.InternalCatalogException: An internal error occurred on the report server. See the error log for more details.;
library!ReportServer_0-18!f1c!03/25/2019-11:44:24:: i INFO: Skipped creating a dump file for the error InternalCatalogException, because a dump with the identical stack trace (with signature 542066093) was already created.
library!ReportServer_0-18!f1c!03/25/2019-11:44:24:: w WARN: Microsoft.ReportingServices.Diagnostics.Utilities.RSException: An internal error occurred on the report server. See the error log for more details. —> Microsoft.ReportingServices.Diagnostics.Utilities.InternalCatalogException: An internal error occurred on the report server. See the error log for more details.
at Microsoft.ReportingServices.Diagnostics.Utilities.RSServiceTraceInternal.FailInternal(String componentName, String message)
at Microsoft.ReportingServices.Diagnostics.Utilities.RSTrace.Assert(Boolean condition, String message)
at Microsoft.ReportingServices.OnDemandProcessing.Scalability.ScalableList1.CheckIndex(Int32 index, Int32 inclusiveLimit) at Microsoft.ReportingServices.OnDemandProcessing.Scalability.ScalableList1.get_Item(Int32 index)
at Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.RowInfo.AddToPageContent(ScalableList`1 columnInfo, Int32& colsOnPage, Boolean isLTR, Boolean pinnedToParentCell, RPLWriter rplWriter, PageContext pageContext, Double pageLeft, Double pageTop, Double pageRight, Double pageBottom, RepeatState repeatState)
at Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.AddToPage(RPLWriter rplWriter, PageContext pageContext, Double pageLeft, Double pageTop, Double pageRight, Double pageBottom, RepeatState repeatState)
at Microsoft.ReportingServices.Rendering.HPBProcessing.PageItemContainer.AddToPage(RPLWriter rplWriter, PageContext pageContext, Double pageLeft, Double pageTop, Double pageRight, Double pageBottom, RepeatState repeatState)
at Microsoft.ReportingServices.Rendering.HPBProcessing.ReportSection.NextPage(RPLWriter rplWriter, Int32 pageNumber, Int32 totalPages, Double top, Double availableHeight, ReportSection nextSection, Boolean isFirstSectionOnPage)
at Microsoft.ReportingServices.Rendering.HPBProcessing.Report.NextPage(RPLWriter rplWriter, Int32 totalPages)
at Microsoft.ReportingServices.Rendering.HPBProcessing.HPBProcessing.GetNextPage(RPLReport& rplReport)
at Microsoft.ReportingServices.Rendering.ImageRenderer.PDFRenderer.Render(Report report, NameValueCollection deviceInfo, Hashtable renderProperties, CreateAndRegisterStream createAndRegisterStream)
at Microsoft.ReportingServices.Rendering.ImageRenderer.RendererBase.Render(Report report, NameValueCollection reportServerParameters, NameValueCollection deviceInfo, NameValueCollection clientCapabilities, Hashtable& renderProperties, CreateAndRegisterStream createAndRegisterStream)
— End of inner exception stack trace —
at Microsoft.ReportingServices.ReportProcessing.ReportProcessing.HandleRenderingException(ReportRenderingException rex)
at Microsoft.ReportingServices.ReportProcessing.Execution.RenderReport.Execute(IRenderingExtension newRenderer)
at Microsoft.ReportingServices.ReportProcessing.ReportProcessing.RenderReport(DateTime executionTimeStamp, ProcessingContext pc, RenderingContext rc, IChunkFactory yukonCompiledDefinition)
at Microsoft.ReportingSer