Answers.Body: <p>To bypass this problem, I use Yes/No custom field to import the data "Belonging to A group". Then I use an advanced search to select those contacts and add them to the A group.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-10-03T23:41:37.037Z
Answers.Text: Ah clever solution; yes this is a good way to handle Group imports
Answers.UserDisplayName: KarinG - Semper IT
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-10-03T21:58:34.750Z
Answers.LastActivityDate: 2017-10-03T21:58:34.750Z
Answers.UserDisplayName: Charles Letaillieur
Answers.Body: <p>You haven't specified your CiviCRM version number, but there was recently a bug, <a href="https://issues.civicrm.org/jira/browse/CRM-20739" rel="nofollow noreferrer">CRM-20739</a>, that caused this problem depending on your import settings.  If you are using a version of CiviCRM less than 4.7.23, the solution is to upgrade.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-12-13T09:58:55.810Z
Answers.Text: Sorry I didn't see this ! We are on 4.7.22 ! Thanks a lot
Answers.UserDisplayName: Charles Letaillieur
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2018-03-28T12:49:23.037Z
Answers.Text: I confirm ! Problem solved by updating to CiviCRM 4.7.29
Answers.UserDisplayName: Charles Letaillieur
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-10-04T14:03:04.013Z
Answers.LastActivityDate: 2017-10-04T14:03:04.013Z
Answers.UserDisplayName: Jon G - Megaphone Tech
Body: <p>I have contacts belonging to different groups.</p>
  
  <p>I made a first csv import successfully : I have all data of contacts and they are all in the same big group.</p>
  
  <p>But then I tried to import them group by group with just their email address and the update option. The import seems to be successful. It mentions "    Stratégie internet: One contact added to this existing group."</p>
  
  <p>But when I go to group panel, the group has no new contact.</p>
  
  <p>I tried many thing (import more than email for this 2nd import, change group visibility, use a new group, etc.) but it is still the same.</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-10-04T02:17:39.390Z
Comments.Text: Generally if you are importing a csv and then planning on reimporting the same list to manipulate other info,, i would recommend adding a column to your csv for External ID, making a unique value for each record eg IMP-1 for the first and drag down to last row. Then when you reimport you can import against Ext ID and avoid any issues that might crop up with Matching Rules etc. That said, I am not too sure if it would fix your issue, hence not posting as an answer, since what you are describing should work fine assuming you are opting for UPDATE when you do your import (which you say you are)
Comments.UserDisplayName: petednz - fuzion
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-10-04T02:18:51.133Z
Comments.Text: The other issue could be your Matching Rules. Do you actually see all the contacts you imported in CiviCRM?
Comments.UserDisplayName: petednz - fuzion
Tags: <import><groups><data-import>
Title: Failed to import contacts into groups (with csv import)
ThreadText: # Failed to import contacts into groups (with csv import)
  
  (Asked by: username_0 on 2017-10-03)
  
  I have contacts belonging to different groups.
  
  I made a first csv import successfully : I have all data of contacts and they are all in the same big group.
  
  But then I tried to import them group by group with just their email address and the update option. The import seems to be successful. It mentions " Stratégie internet: One contact added to this existing group."
  
  But when I go to group panel, the group has no new contact.
  
  I tried many thing (import more than email for this 2nd import, change group visibility, use a new group, etc.) but it is still the same.
  
  **Tags:** import, groups, data-import
  
  > **Comments:**
  > **username_1**: Generally if you are importing a csv and then planning on reimporting the same list to manipulate other info,, i would recommend adding a column to your csv for External ID, making a unique value for each record eg IMP-1 for the first and drag down to last row. Then when you reimport you can import against Ext ID and avoid any issues that might crop up with Matching Rules etc. That said, I am not too sure if it would fix your issue, hence not posting as an answer, since what you are describing should work fine assuming you are opting for UPDATE when you do your import (which you say you are)  
  > **username_1**: The other issue could be your Matching Rules. Do you actually see all the contacts you imported in CiviCRM?  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_0 on 2017-10-03. Score: 1
  
  To bypass this problem, I use Yes/No custom field to import the data "Belonging to A group". Then I use an advanced search to select those contacts and add them to the A group.
  
  > **Comments:**
  > **username_2**: Ah clever solution; yes this is a good way to handle Group imports  
  
  ---
  
  ### Answer by username_3 on 2017-10-04. Score: 1
  
  You haven't specified your CiviCRM version number, but there was recently a bug, [CRM-20739](https://issues.civicrm.org/jira/browse/CRM-20739), that caused this problem depending on your import settings. If you are using a version of CiviCRM less than 4.7.23, the solution is to upgrade.
  
  > **Comments:**
  > **username_0**: Sorry I didn't see this ! We are on 4.7.22 ! Thanks a lot  
  > **username_0**: I confirm ! Problem solved by updating to CiviCRM 4.7.29  
  
  ---
  
  