From 900cf785b9c14fc1f6581aa9ae6a0c25c6b57df0 Mon Sep 17 00:00:00 2001
From: Nikita Beliy <beliy.nikita@outlook.com>
Date: Thu, 21 Jan 2021 12:12:24 +0100
Subject: [PATCH] warn only once when brainvision timestamps cannot be parsed
 (#1646)

---
 fileio/private/read_brainvision_vmrk.m | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fileio/private/read_brainvision_vmrk.m b/fileio/private/read_brainvision_vmrk.m
index 924349d8a9..30b8df6fde 100644
--- a/fileio/private/read_brainvision_vmrk.m
+++ b/fileio/private/read_brainvision_vmrk.m
@@ -35,6 +35,8 @@
 event = [];
 line  = [];
 
+readTime = ft_platform_supports('datetime');
+
 while ischar(line) || isempty(line)
   line = fgetl(fid);
   if ~isempty(line) && ~(isnumeric(line) && line==-1)
@@ -57,11 +59,12 @@
         event(end  ).value    = tok{2};
         event(end  ).sample   = str2double(tok{3});
         event(end  ).duration = str2double(tok{4});
-        if numel(tok)>5 && ft_platform_supports('datetime')
+        if numel(tok)>5 && readTime
           try
             event(end).timestamp = datetime(tok{6}, 'InputFormat', 'yyyyMMddHHmmssSSSSSS');
           catch
             ft_warning('skipping invalid datetime in BrainVision marker file');
+            readTime = false;
           end
         end
       end