Getting Error Aspose Total temporary license

Aspose.Total Product Family
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1

Hello,

i use Aspose Total temporary license for testing but i getting error to showing all ost file mails. Can anyone help me to fix this error.

2

@logicfusiontech

Overview

You are using an Aspose.Total temporary license to work with .ost files via Aspose.Email for .NET and you get an error when trying to enumerate the messages.
Below are the most common reasons for this problem and the steps to resolve it.

1. Make sure the license is applied before any Aspose.Email API is called

using Aspose.Email;
using Aspose.Email.Storage.Pst;

// -------------------------------------------------
// 1️⃣  Load the temporary license
// -------------------------------------------------
var license = new License();
license.SetLicense(@"C:\Licenses\Aspose.Total.lic");   // <-- path to your .lic file

// -------------------------------------------------
// 2️⃣  Open the OST file
// -------------------------------------------------
string ostPath = @"C:\Data\sample.ost";
PersonalStorage pst = PersonalStorage.FromFile(ostPath);

// -------------------------------------------------
// 3️⃣  Work with the folders / messages
// -------------------------------------------------
FolderInfo root = pst.RootFolder;

foreach (MessageInfo msgInfo in root.GetContents())
{
    MapiMessage msg = pst.ExtractMessage(msgInfo);
    // Example: display subject
    Console.WriteLine(msg.Subject);
}

Key points

What to check Why it matters
License.SetLicense is executed first If the license is set after you have already created a PersonalStorage instance, Aspose will fall back to the evaluation mode and you will see licensing‑related errors.
The .lic file is the correct Aspose.Total temporary license The temporary license is fully functional (no feature restrictions) for the duration of its validity (normally 30 days).
The path to the license file is absolute or correctly resolved relative to the executable A wrong path results in a “license not found” exception.

Documentation: Aspose.Email License

2. Verify the OST file itself

Check How to verify
File integrity – open the OST in Outlook or Outlook Express to confirm it isn’t corrupted.
Password protection – Aspose.Email cannot open password‑protected OST files. Remove the password first (or use Outlook to export to an unprotected PST).
Supported format version – Aspose.Email supports Outlook 2003/2007/2010/2013/2016 OST formats. Very old versions (< Outlook 2003) are not supported.

If the file opens fine in Outlook but still fails in code, capture the exact exception text and stack trace (see Section 4).

Documentation: Working with PST/OST Files

3. Common pitfalls and their fixes

Symptom Likely cause Fix
System.Security.SecurityException or “License is not set” License file not found or loaded after first API call Ensure License.SetLicense runs at the very start of Main/Application_Start.
Aspose.Email.Storage.Pst.Exceptions.StorageException: "The file format is not supported" Trying to open a PST with FromFile while the file is actually OST, or vice‑versa. Use PersonalStorage.FromFile(path) for both PST and OST – the API auto‑detects the format.
ArgumentException: "The file is corrupted" OST file damaged or created by a newer Outlook version not yet supported. Re‑export the mailbox to a fresh OST or convert it to PST using Outlook.
No messages returned (empty collection) Root folder is not the folder you expect (e.g., you need to navigate to Inbox sub‑folder). Use FolderInfo inbox = pst.RootFolder.GetSubFolder("Inbox"); and enumerate that folder.

4. Next steps – give us the exact error

If you have already applied the license as shown above and the file is known to be valid, please post:

  • The full exception message (including inner exception, if any)
  • The stack trace (the line numbers are helpful)
  • The code snippet you are using to open the OST

With that information we can pinpoint the issue more precisely.

5. Quick checklist before replying

  1. License is set first.
  2. License file path is correct.
  3. OST file opens in Outlook.
  4. No password protection.
  5. You are using the latest version of Aspose.Email for .NET (check the NuGet package or DLL version).

If any of these items fails, correct it and re‑run the sample.

Helpful Links

Feel free to reply with the detailed exception or your code snippet, and we’ll help you get the OST content displayed correctly.

— Aspose Support Team

3

@logicfusiontech,

Are you using Aspose.Email for .NET? Which version are you using? What error or exception are you encountering? Please provide the complete error trace. Additionally, could you please share your sample code and any sample files (if applicable) to help us reproduce the issue on our end? We will check it soon.

P.S. Please compress the files into a zip folder before attaching them here.