NewsFlash – PyU4V 3.0 Released

PyU4V has just had a new release, for customers new to REST API and VMAX you’re in a great place as the new release is easier to get started with and documentation has improved (by improved I mean exists). Because of this my blog post will be short with the links and a quick video to show how to install and make a REST call.using one of the pre-built functions.

Welcome to PyU4V’s documentation! — PyU4V 3.0.0 documentation All of the packages functions are documented here along with detailed instructions on how to get going.

Note, there are a few fundamental changes in how the new package is structured which makes scripts written with 2.0 version incompatible. The reasons for doing this will be obvious once you start to work with it, but the net result is better error handling, consistency across functions, and better organisation for future maintenance.

The functions are divided up into categories – common, provisioning, replication, and performance.

  • Common covers a few utils and also covers system calls
  • Provisioning covers all things provisioning and masking related, and corresponds with the ‘sloprovisioning’ endpoints
  • Replication covers local and remote replication
  • Performance covers all the performance related calls.

The example scripts used in my previous posts have been converted to use the new library so check those out on

Hopefully there is less of a learning curve with this implementation, A big shout out to Ciara Stacke and Michael McAleer who did all the conversion work on this, you guys rock.


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XDDS:6D813B19 – “An error has occurred with the Citrix License Server. Check the license server to make sure it is running, then try again.” on the Search node in Citrix Studio.

The error message “An error has occurred with the Citrix License Server. Check the license server to make sure it is running, then try again.” might be displayed on the Search node in Citrix Studio when user opens or refreshes the node.

Error details:

Error Id: XDDS:6D813B19


Citrix.Console.Common.CitrixAggregateException One or more parallel operations failed

at Citrix.Console.Common.CitrixParallel.InternalForEach[TIn](IEnumerable`1 items, Action`1 operation, Int32 maxSimultaneous)

at Citrix.Console.PowerShellSdk.SiteInformationService.SiteInformationService.Refresh()

at Citrix.Console.Desktops.UI.Mmc.Tabs.VdiMachineTabViewModel.<AddRefreshHandlers>b__4_0(Object s, EventArgs e)

at Citrix.Console.CommonControls.Mmc.SearchNodeTabViewModel`1.<>c__DisplayClass54_0.<PerformSearchInternal>b__0()

at Citrix.Console.CommonControls.ViewModelBase.<>c__DisplayClass90_0.<RunBackgroundTask>b__0(Object s, DoWorkEventArgs e)

Inner Exception:

Citrix.Console.Models.Exceptions.ScriptException An error has occurred with the Citrix License Server. Check the license server to make sure it is running, then try again.

at Citrix.Console.PowerShellInteraction.CmdletExecutionMethods.CreateException[T](ICommonLog logger, ExecutionResults`1 results, ICmdletExecutionHost host)

at Citrix.Console.PowerShellInteraction.CmdletExecutionMethods.Execute[T](ISdkCmdlet`1 sdkCmd, ICmdletExecutionHost host, Boolean allowFailover)

at Citrix.Console.PowerShellSdk.LicensingService.Scripts.GetCertificateScript.RunScript()

at Citrix.Console.PowerShellInteraction.PowerShellScript`1.Run()

at Citrix.Console.PowerShellSdk.SiteInformationService.SiteInformationService.GetLicenseAlert()

at Citrix.Console.PowerShellSdk.SiteInformationService.SiteInformationService.<>c__DisplayClass33_0.<Refresh>b__7()

at Citrix.Console.Common.CitrixParallel.<>c__DisplayClass4_1`1.<InternalForEach>b__0(Object arg)

DesktopStudio_ErrorId : UnknownError

Sdk Error Message : UnknownError

Sdk Error ID : Citrix.PowerShell.LicensingAdminStatus.UnknownError,Citrix.Licensing.Admin.SDK.Commands.GetLicCertificateCommand

ErrorCategory : NotSpecified

DesktopStudio_PowerShellHistory : Get the certificate for the Licensing Service

Date Time

Get-LicCertificate -AdminAddress “https://LICENSE_SERVER_ADDRESS:PORT_NUMBER/”

Get-LicCertificate : UnknownError

+ CategoryInfo : InvalidOperation: (Get-LicCertificate:String) [Get-LicCertificate]、InvalidOperationException

+ FullyQualifiedErrorId : Citrix.PowerShell.LicensingAdminStatus.UnknownError,Citrix.Licensing.Admin.SDK.Commands.GetLicCertificateCommand


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Blockchain Proof Of Concept Completed By SWIFT

Blockchain Proof Of Concept Completed By SWIFT

Uncategorized | March 9, 2018 br>By:

Financial messaging provider SWIFT has successfully conducted a distributed ledger technology (DLT) proof of concept for Nostro accounts reconciliation with 34 banks. A Nostro account is a bank’s account in a foreign currency in another bank.

The proof of concept, which is based on Hyperledger Fabric v1.0 technology and has been conducted in concert with six founding banks, is part of the Swift gpi initiative to re-arm the correspondent banking system for a new age of technological disruption.

The PoC sought to answer a number of questions surrounding DLT: whether the technology, combined with SWIFT assets, would meet industry-level governance, security and data privacy requirements; whether DLT could bring concrete benefits over other architectures; and to check the technology’s current level of maturity to serve as a production-grade application within a mission-critical global infrastructure.

According to SWIFT, participating banks deployed their own node in the SWIFT DLT sandbox. PoC results showed that DLT could provide the functions needed for Nostro account reconciliation, including “real-time event handling, transaction status updates, full audit trails, visibility of expected and available balances, real-time simplified account entries confirmation, the identification of pending entries and potential related issues, and generated the data required to support regulatory reporting.”

The PoC also demonstrated the significant progress DLT has made with regards to data confidentiality, governance, security, and identification frameworks. However, it also showed that further progress is needed on the DLT technology itself before the financial industry could adopt the technology on a large scale.

For example, while 528 channels were required in the PoC to ensure Nostro accounts would only be stored on the nodes of their account servicers and owners, to productize the solution, more than 100,000 channels would need to be established and maintained, covering all existing Nostro relationships, presenting significant operational challenges.

Overall, Damien Vanderveken, Head of Research and Development at SWIFT, said the PoC went extremely well, proving the fantastic progress that has been made with DLT and the Hyperledger fabric in particular.

“The DLT sandbox enabled us to control access, to define and enforce user privileges, to physically segregate confidential data and store it only with the relevant parties while supporting a strong identity framework by linking all participants to their BIC, and having all keys signed by a SWIFT certification authority,” said Vanderveken. “Although the PoC demonstrated DLT could improve Nostro liquidity management and reconciliation processes, it also revealed that the pre-requisites will have to be met before banks can enjoy the full benefits of switching to a DLT process.”

Stephen Gilderdale, SWIFT’s Chief Platform Officer, said it is a strategic priority for SWIFT to work with new technologies like DLT and incorporate them into key solutions like gpi.

“We are already working on new PoCs and will continue our research and development (R&D) efforts to ensure that SWIFT customers will be able to leverage their existing SWIFT infrastructure and connectivity to benefit from blockchain services, whether offered by SWIFT or by third parties, on a secure and trusted platform,” said Gilderdale.


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