diff --git a/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp b/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp
index 7ae47954b..416b484e3 100644
--- a/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp
+++ b/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp
@@ -448,6 +448,11 @@ namespace BlackMisc
                     }
                     return false;
                 }
+                if (package.planes.isEmpty())
+                {
+                    m_loadingMessages.push_back(CStatusMessage(this).error(u"%1/xsb_aircraft.txt Line %2 : invalid position for command.") << path << lineNum);
+                    return false;
+                }
 
                 if (tokens[1] != "SOLID") { return true; }
 
@@ -487,6 +492,11 @@ namespace BlackMisc
                     m_loadingMessages.push_back(m);
                     return false;
                 }
+                if (package.planes.isEmpty())
+                {
+                    m_loadingMessages.push_back(CStatusMessage(this).error(u"%1/xsb_aircraft.txt Line %2 : invalid position for command.") << path << lineNum);
+                    return false;
+                }
 
                 QString icao = tokens[1];
                 package.planes.back().icao = icao;
@@ -502,6 +512,11 @@ namespace BlackMisc
                     m_loadingMessages.push_back(m);
                     return false;
                 }
+                if (package.planes.isEmpty())
+                {
+                    m_loadingMessages.push_back(CStatusMessage(this).error(u"%1/xsb_aircraft.txt Line %2 : invalid position for command.") << path << lineNum);
+                    return false;
+                }
 
                 QString icao = tokens[1];
                 package.planes.back().icao = icao;
@@ -519,6 +534,11 @@ namespace BlackMisc
                     m_loadingMessages.push_back(m);
                     return false;
                 }
+                if (package.planes.isEmpty())
+                {
+                    m_loadingMessages.push_back(CStatusMessage(this).error(u"%1/xsb_aircraft.txt Line %2 : invalid position for command.") << path << lineNum);
+                    return false;
+                }
 
                 QString icao = tokens[1];
                 package.planes.back().icao = icao;