Pdf creation fails when trying to created 2 big PDF simultaneously

Hello
We are using Aspose.Pdf 23.5 and MVC5
We are trying to generate 2 big pdf files in parallel. Each file is created with its own name and got an error.
If we doing each generation separately everything is OK

This error we’ve get :
[IndexOutOfRangeException: האינדקס היה מחוץ לגבולות המערך.]
#=zO3P4c$DQ8HKZJ_I8ZHdS5rH3QpkCVyAvkg==.#=zdOvX4eYCUfL7xdMrFw==(מחרוזת #=zBZVNa34=, בוליאנית #=z7hX9dzJgwlCUIndiyg==)
#=z0g5wsElJWqLEHOIM$DWgOcbeVZf2L4$G8w==.#=z1nm6ogQ=(מחרוזת #=zQ6k3uwY=, בוליאנית #=zL1Ki77mfJUTuHC35GA==) +68
#=zG8Zz8FMbPtEJPeK3qqFEumXoCXHs8FdY28Bfym9vw3VLj2m5lA==.#=znOeSqh8=(מחרוזת #=zQ6k3uwY=, LanguageTransformation #=zqqZtqmWlBw3y) +788y
#=zJRoqtKfEX723e63CZPklJ6spAfoaeQx_Jt4cQwrhgDBAU6X4yA===.#=zBI0CXQqbuxz_(#=zGB_yxRnH_$8qwFwZH0vfJIzKd63=Z=H=oLMzFw=Edit=#5_$If0 Text=#5_$If0 =) +348
Aspose.Pdf.Text.TextSegment.set_Text(ערך מחרוזת) +222
Aspose.Pdf.Text.TextSegment.#=zbA3IMhU=(#=znkBLFSf92CE8QzrMCb5V_A8xOHhrsIprS4mBMPzqLcTQx2vepki8GSo= #=zd4Dwh6pAM2IA) +321
Aspose.Pdf.Text.TextBuilder.#=zrv4JIP4=(TextFragment #=zjPHXrPui1kOw, Int32 #=zuqPhipI=, Boolean #=zAUvWkohgyaI7) +810
Aspose.Pdf.Text.TextBuilder.AppendText(TextFragment textFragment) +46
#=z4uUtWFgV2XlvbtgoXaaaPYJLehUpr4oe9Q==.#=zmEPis3g=(מחרוזת #=zQ6k3uwY=, PointF #=zuQhr2Zs=) +1211
#=zY6d_C6Jgk4RqfbJRyOr4CvEDq18E.#=zjT75PVc=(#=z_TFb9lkud4Rf5kqLEFgXLu_nBsoM_I2kFA== #=ztSNoXkqptwNw, #=zjT75PVc=(#=z_TFb9lkud4Rf5kqLEFgXLu_nBsoM_I2kFA== #=ztSNoXkqptwNw, #=ZJJJA_NYHX,7vDJJA_NY4XhXvdXvdXvvxvxvxh, 2012 tPgQBOjkkG9LuGKHQA== #=zbweEl0E=) +3890
#=zY6d_C6Jgk4RqfbJRyOr4CvEDq18E.#=zfyqiCFjMrJ1B(#=zB9n7fX6phRZzvx8W$8MJ11Lw4HyykqgF9Q== #=z_Vo8VYE=, Boolean #=zhxzpe=, Boolean #=zhxzpe DHBYv90tPgQBOjkkG9LuGKHQA== #=zbweEl0E=) +433
#=zY6d_C6Jgk4RqfbJRyOr4CvEDq18E.#=zfyqiCFjMrJ1B(#=zB9n7fX6phRZzvx8W$8MJ11Lw4HyykqgF9Q== #=z_Vo8VYE=, Boolean #=zhxzpe=, Boolean #=zhxzpe DHBYv90tPgQBOjkkG9LuGKHQA== #=zbweEl0E=) +452
#=zY6d_C6Jgk4RqfbJRyOr4CvEDq18E.#=zkIdBjbaLqeA8SLaQlw==(#=z2teoM_6pUkvNAezDfg== #=zZ98tN00AImCUyZ8E9Q==, Boolean #QxstJD=7xJDJ, Boolean #7xsJDDD vDhBYv90tPgQBOjkkG9LuGKHQA== #=zbweEl0E=) +3439
#=zY6d_C6Jgk4RqfbJRyOr4CvEDq18E.#=z_Gi0rvU=(#=zQVJg1uLeXTamXwzDT5ZHwL7FIizpz$Eslg== #=zj3MkMYw=, #=zstDy0rvU=(#=zstDy0rvU=(#=zQVJg1uLeXTamXwzDT5ZHwL7FIizpz$Eslg== #=zj3MkMYw=, #=zstDy0rvU=80ZGWN72N7GWN72GWN72GWN72GWN72GWN72GWN72GWN72GW Q==, בוליאני #=zhtEbhsxsJA_NY4X5JQ==, #=zMLpeDD7vvDhBYv90tPgQBOjkkG9LuGKHQA== #=zbweEl0E= ) +1423
#=z3u$RU9fESNWuzlbhb0MqX$kyeMcW0i2Mfg==.Render(#=zertJDiLKotsPqR9ADIk3$pxECeW4 #=zVl5gT38=, CancellationToken #=zKag$J4w=) +243
#=zslB_J2wR_qK5GqVcz1R5K0weYL9$ggZMWw==.#=z6ztZhuwA6mnV(#=zLziqkW0Rt1ID$$EJbC3T_Xk= #=ztEt4gq19cydD9dAiKJQnWy$y=CBZQJPJWY$JPJQJ$JPJPJQJ$ ot[] #=z9QHu3YRq11C8, #=zertJDiLKotsPqR9ADIk3$pxECeW4 #=zVl5gT38=, CancellationToken # =zwl6up1I=) +852
#=zoJdleXCqLDG06fPZsfiAlUOoZkCB.Render(#=zertJDiLKotsPqR9ADIk3$pxECeW4 #=zVl5gT38=, CancellationToken #=zwl6up1I=, #=zru935AO7k62J1gmow=TvzD=4VzVzD=4VzVzD=4VZVzD=4VzVzD=4VzVzD=4VzVzD=4VzVzD=4VZV, 2010 yP43YBTW4TSUQsDbxsI=[] #=z9_lkGsI=) +356
#=zoJdleXCqLDG06fPZsfiAlUOoZkCB.Render(#=zertJDiLKotsPqR9ADIk3$pxECeW4 #=zVl5gT38=, TimeSpan #=zvWVRfFM=, #=zTZDVyP43YBTW4TSUIQs[lk]=8=z9_DbI]+
#=z5Z7Qvq2jOB5tjOCW2GOaRB3HcR9S.Render(#=zertJDiLKotsPqR9ADIk3$pxECeW4 #=zVl5gT38=, #=zSyQT9Rc= #=zfsF1ZUc=, TimeSpan #=zv +WVR1fFM)
#=z5Z7Qvq2jOB5tjOCW2GOaRB3HcR9S.Render(#=zertJDiLKotsPqR9ADIk3$pxECeW4 #=zVl5gT38=, #=zSyQT9Rc= #=zfsF1ZUc=) +55
#=zs4iJg0GyJwbgNNdS5PXeXSeCx6C4.#=zXHrH0cHUmMKP(Stream #=zAczM5P7orCR6, Document #=zA3PclWePAXTN, HtmlLoadOptions #=zEBe2r6i1pamU, +Gen0)
#=zs4iJg0GyJwbgNNdS5PXeXSeCx6C4.#=zvr6tJYw=(זרם #=zAczM5P7orCR6, Document #=zA3PclWePAXTN, HtmlLoadOptions #=zEBe2r6i1pamU, String #=h67Jys)
#=zs4iJg0GyJwbgNNdS5PXeXSeCx6C4.#=zvr6tJYw=(זרם #=zAczM5P7orCR6, Document #=zA3PclWePAXTN, HtmlLoadOptions #=zEBe2r6i1pamU) +42
Aspose.Pdf.Document.#=zWQb64Ko=(זרם #=zyUEvkTs=, LoadOptions #=ze_om$e0=) +921
Aspose.Pdf.Document…ctor(קלט זרם, אפשרויות LoadOptions) +450
LandingPages.Common.RazorViewToStringFormat.GeneratePDF(String HtmlContent, String file) +417
LandingPages.Controllers.HomeController.IndexSummaryInvoices(String jsonstr) +1105
lambda_method(Closure , ControllerBase , Object[] ) +139
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary2 פרמטרים) +229 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary2 פרמטרים) +35
System.Web.Mvc.Async.AsyncControllerActionInvoker.b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +39
System.Web.Mvc.Async.WrappedAsyncResult2.CallEndDelegate(IAsyncResult asyncResult) +77 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +42 System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +72 System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +396 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +42 System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +38 System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +188 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38 System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +32 System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +73
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +52
System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +39 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38 System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +46 System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +73
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IEexecutionStep.Execute() +431
System.Web.HttpApplication.ExecuteStepImpl(IEexecutionStep step) +75

@evgenioptisoft
At the moment, the library has a limitation that parallelism is not possible when working with one document.
The development team has the task of adding the ability to work in parallel with one document.
But it is impossible to say when this will be implemented.

Sergei thanks a lot for the answer