Полностью доделал

WinFormsProject/AppView/PluginsConvention.cs

@@ -145,6 +145,8 @@ namespace AppView
         }
 
         public bool CreateWordDocument(PluginsConventionSaveDocument saveDocument)
+        {
+            try
             {
                 ImageClass info = new ImageClass();
 
@@ -155,10 +157,19 @@ namespace AppView
                 info.Files = images;
 
                 documentWithImage1.CreateDocument(info);
+                MessageBox.Show("Готово");
                 return true;
             }
+            catch(Exception e)
+            {
+                MessageBox.Show(e.Message, "Ошибка");
+                return false;
+            }
+        }
 
         public bool CreateTableDocument(PluginsConventionSaveDocument saveDocument)
+        {
+            try
             {
                 System.Text.Encoding.RegisterProvider(System.Text.CodePagesEncodingProvider.Instance);
 
@@ -185,10 +196,18 @@ namespace AppView
                 MessageBox.Show("Готово");
                 return true;
             }
+            catch(Exception e)
+            {
+                MessageBox.Show(e.Message, "Ошибка");
+                return false;
+            }
+        }
 
         public bool CreateChartDocument(PluginsConventionSaveDocument saveDocument)
         {
 
+            try
+            {
                 var providers = _providerStorage.GetFullList();
 
                 var uniqueTypes = providers.Select(p => p.Type).Distinct();
@@ -212,8 +231,15 @@ namespace AppView
                 }
 
                 gistograma1.GenerateExcelChartDocument(saveDocument.FileName, "Сводка по типам изделия.", "Количество поставщиков для товаров каждого типа", WinFormsLibrary.not_visual.LegendPosition.Bottom, data);
+                MessageBox.Show("Готово");
                 return true;
             }
+            catch(Exception e)
+            {
+                MessageBox.Show(e.Message, "Ошибка");
+                return false;
+            }
+        }
 
 
     }

WinFormsProject/WinFormsAppByPlugins/FormMain.cs

@@ -182,6 +182,8 @@ namespace WinFormsAppByPlugins
         }
 
         private void CreateSimpleDoc()
+        {
+            try
             {
                 SaveFileDialog saveFileDialog = new()
                 {
@@ -193,7 +195,11 @@ namespace WinFormsAppByPlugins
 
                 }
             } 
+            catch(Exception ex) { MessageBox.Show(ex.Message, "Îøèáêà çàãðóçêè ïëàãèíà."); }
+        }
         private void CreateTableDoc()
+        {
+            try
             {
                 SaveFileDialog saveFileDialog = new()
                 {
@@ -205,7 +211,11 @@ namespace WinFormsAppByPlugins
 
                 }
             }
+            catch (Exception ex) { MessageBox.Show(ex.Message, "Îøèáêà çàãðóçêè ïëàãèíà."); }
+        }
         private void CreateChartDoc()
+        {
+            try
             {
                 SaveFileDialog saveFileDialog = new()
                 {
@@ -216,6 +226,8 @@ namespace WinFormsAppByPlugins
                     _plugins[_selectedPlugin].CreateChartDocument(new PluginsConventionSaveDocument() { FileName = saveFileDialog.FileName });
                 }
             }
+            catch (Exception ex) { MessageBox.Show(ex.Message, "Îøèáêà çàãðóçêè ïëàãèíà."); }
+        }
 
         private void ThesaurusToolStripMenuItem_Click(object sender, EventArgs e) => ShowThesaurus();
         private void AddElementToolStripMenuItem_Click(object sender, EventArgs e) => AddNewElement();