Get Outlook Mail Messages : Cannot parse condition, Error at "("


I am trying to make the bot read and download attachments from all the unread emails with a matching Subject however, it is giving me an error “Message: Cannot parse condition, Error at “(”. Exception type: System.Runtime.InteropServices.COMException”. Please find attached error screenshot.

The same program runs on a different email address but not working for the current one. Can someone help me figure out the issue. Thank you.

I think the problem is in the Filter property. Can you show what you have there?

@ClaytonM Yeah sure I have attached the project file for your reference.
EmailsPA.xaml (18.5 KB)


Could you please take screenshot of that expression the one you wrote in Filter property and show me once.

@ClaytonM @lakshman Here is the screenshot. Thank you.

You might need a single quote around the subject like this:
"[Subject] = '"+mail.Subject.ToString+"'"

@lakshman can correct me if I’m wrong



I guess mail is not of type System.Net.MailMessage. We are using this expression in Filter property of Get Outlook MailMessage Activity. It should be like this:

               "[Subject] = ' subject of the mail ' "

If we store subject in a variable then we have mention like : varSubject.Tostring


@ClaytonM @lakshman I tried both ways but it’s still not working. It works fine for other email addresses but when I trying to use on my work email it doesn’t work.

sorry but it is not working. I tried yours and ClaytonM way also but still count is “0”.
without using filter it properly fetching mails.
correct me if i am doing wrong

Hmm, I’m not sure. Have you looked for similar issues on the forums?

It’s possible one of your Emails has a Subject that just doesn’t work with the filter. But, you can run the mailmessages variable through a For Each loop and check the subject of each one. You can also use .net to filter the mailmessages, but might be slower since it needs to get all emails up to your Top property.

The .net to filter would look like this:

mailmessages.Where(Function(m) m.Subject.ToString.Trim.ToUpper = mail.Subject.ToString.Trim.ToUpper)

which will create a new enumerable/array of your mailmessages that meet that condition.

Also, this is assuming that your mail variable is from another set of emails prior to this Get Mail Message activity.

EDIT: use an Assign activity with the .net code


If you are storing requried subject in variable and passing here then you have to mention like this:

            "[Subject] = ' "+varSubject.Tostring+" ' "
1 Like

Thanks @ClaytonM I have tried looking for similar issues on the forums but didn’t find any relevant post. I will try your this approach as well. Thank you so much for your help.

@ClaytonM Can you please check my project file once. I am not really sure if the sequence and the logic is correct. Thank you.
EmailsPA.xaml (18.5 KB)

Sure. I have a few comments.

Why are you getting the MailMessages twice? Typically, you only get the MailMessages one time (possibly with a filter), then do something with it. However, you are trying to Get MailMessages for each individual mail message, which seems wrong to me. So I am asking if you have a reason for this.

Here are some additional suggestions as far as coding practices:
mail.Subject.Contains("MetroFax") or mail.Subject.Contains("Metrofax") or mail.Subject.Contains("metrofax") or mail.Subject.Contains("METROFAX")
You can change this long condition simply by change the string to upper or lower case.
much simpler :slight_smile:

Also, it is good to use Path.Combine() when joining folders and filenames together. This is helpful, because you don’t need to worry about the ending slash mark. Secondly, use either Now or Today as your current DateTime so simplify things a bit
System.IO.Path.Combine(folderPath, Today.ToString("MM-dd-yyyy")
I also usually suggest putting the year first in the date for folder and filenames, because it sorts better alphabetically. "yyyy-MM-dd" which will put 2019-07-03 above 2018-12-01, whereas, 07-03-2019 will be below 12-01-2018, even though it is a newer date

The Save Attachments looks good, but if you get an error on it, then you might need to check the attachment count beforehand, like If mail.Attachments.Count > 0

Other than that, I just don’t know why you have that second Get Mail Message step.

Hope that helps.


If your outlook only has one account then you can remove the account property entirely.

@ClaytonM Thank you for correcting me and I greatly appreciate your suggestions. The reason why I have used Outlook activity twice is because when I am trying to put the filter on the First outlook activity it is not working.

This is what I tried: “[subject]=‘MetroFax’”. But it didn’t return anything so I have used another outlook activity inside the loop to “mark as read” only those emails with “MetroFax” keyword.

Can you help me figure out how to make the filter work with just one Outlook activity?

Just out of curiosity, does the If Activity work correctly, like it’s finding the emails with ‘MetroFax’?

In order to troubleshoot the Filter property, you would want to look at the exact subject string and check its case. Because if you don’t want it case sensitive, you’ll need a different filter string. Also, I think the main issue is that you are using “=” so the subject is required to be exactly MetroFax. See if replacing the equals with “Like” works. [Subject] Like 'MetroFax'"
However, I’m not a big user of sql syntax like this, so I could be wrong on that. You want to filter if it contains ‘MetroFax’ and I think Like is the equivalent of that.

If you get the filter in the first one working, then you can remove the If activity.

@ClaytonM It didn’t work with this condition. Got an error ‘Invalid condition’. The if condition works fine but when trying to do through the filter property it doesn’t work.

If possible can you send me a working example relevant to what I am trying to achieve. As in making the bot read only emails with Subject ‘MetroFax’ and marking only those emails as read. Thank you and apologies for bothering you again.

I found this other syntax that may work in the filter property.
"@SQL=urn:schemas:httpmail:subject LIKE '%MetroFax%'"

Also, check here for maybe some other ideas: Search results for 'filter get mail' - UiPath Community Forum



Hi @ClaytonM This approach worked in my case. Thank you so much :slight_smile: